# Players getting Network Connection Lost when joining public lobby **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** closed, fortnite-creative, unreal-editor-for-fortnite, fortnite\ **Created:** [May 17, 2025, 1:05am UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383 "2025-05-17T01:05:32Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![ndr](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ndr](https://forums.unrealengine.com/u/ndr)\ **Post date:** [May 17, 2025, 1:05am UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/1 "2025-05-17T01:05:33Z")
### Summary Some players are unable to queue to our map when matchmaking privacy is set to public. A few hours ago we were able to queue with no issues but now it doesn’t work. Private matchmaking and both edit and playtest sessions work with no issues ### Please select what you are reporting on: Creative ### What Type of Bug are you experiencing? Assets ### Steps to Reproduce 1. Put in the island code 1942-4233-3811 2. Set matchmaking privacy to public 3. Queue and wait for loading screen to appear 4. Network Connection Lost screen appears ### Expected Result Successfully join public matchmaking, same as private one works ### Observed Result Network Connection Lost screen appears ### Platform(s) windows ### Island Code 1942-4233-3811 ### Upload an image ![image (13).png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/5/c/75c776e77b1bf9338620b745a5df749777cb1a22.png) ---
**Author:** ![AmayaKitten](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@AmayaKitten](https://forums.unrealengine.com/u/AmayaKitten)\ **Post date:** [May 17, 2025, 9:04pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/3 "2025-05-17T21:04:20Z")
I have the exact same problem with many different islands I’ve tried to play on. I have tried to connect both private and public with the same result. The most current island I was on was: 6136-8270-1591 ![Image3](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/d/2/ad2f7868f568d27d9936e54185520b81be199060.png) ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [May 23, 2025, 3:35pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/4 "2025-05-23T15:35:17Z")
@ndr Is this still happening? ---
**Author:** ![araa](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@araa](https://forums.unrealengine.com/u/araa)\ **Post date:** [May 23, 2025, 5:13pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/5 "2025-05-23T17:13:07Z")
Hey im Andrejs partner and the issue is still occurring ---
**Author:** ![araa](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@araa](https://forums.unrealengine.com/u/araa)\ **Post date:** [May 23, 2025, 5:40pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/6 "2025-05-23T17:40:04Z")
![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/c/4/8/c48d6fcd4bd840ad72da599c38be38359122a3db.jpeg) ![image222](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/f/8/af87f63e6eb34e37c0b80e6d697d221563049603.png) ---
**Author:** ![ndr](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ndr](https://forums.unrealengine.com/u/ndr)\ **Post date:** [May 23, 2025, 6:21pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/7 "2025-05-23T18:21:22Z")
Yes, from our testing it still happens around 40% of time ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [May 28, 2025, 12:06pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/8 "2025-05-28T12:06:46Z")
Could you let us know what country most of your clicks are coming from and what the percentage is? ---
**Author:** ![ndr](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ndr](https://forums.unrealengine.com/u/ndr)\ **Post date:** [May 28, 2025, 2:42pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/9 "2025-05-28T14:42:03Z")
First is United States with just under 30% ---
**Author:** ![ndr](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ndr](https://forums.unrealengine.com/u/ndr)\ **Post date:** [May 28, 2025, 8:56pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/10 "2025-05-28T20:56:28Z")
We just got it in edit session too, seems like an issue with players joining in progress (sometimes). We did notice “Player joined the world” and “Player has left the world” messages in chat fire immediately one after the other and player gets Network Connection Lost screen without ever actually getting in ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [May 29, 2025, 1:10pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/11 "2025-05-29T13:10:05Z")
Could you get us your logs so we can try to figure this out here? We are unable to reproduce it. ---
**Author:** ![ClickGamesFN](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ClickGamesFN](https://forums.unrealengine.com/u/ClickGamesFN)\ **Post date:** [June 10, 2025, 7:51pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/12 "2025-06-10T19:51:09Z")
I’m also having the same issue in my island: 4122-6885-3510 I’m attaching the logs below. [FortniteGame.log](https://forums.unrealengine.com/uploads/short-url/6CeWNLRgqBr5FsYp9FmB08HH5Zc.log) (9.2 MB) ---
**Author:** ![BrendannnD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BrendannnD](https://forums.unrealengine.com/u/BrendannnD)\ **Post date:** [June 14, 2025, 7:33am UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/13 "2025-06-14T07:33:15Z")
Also getting this issue on my island: 0831-6059-6603 ---
**Author:** ![BrendannnD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BrendannnD](https://forums.unrealengine.com/u/BrendannnD)\ **Post date:** [June 16, 2025, 9:02pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/14 "2025-06-16T21:02:07Z")
@Flak still getting this after multiple updates. Really need help on this - it is hurting my game massively! [FortniteGame.log](https://forums.unrealengine.com/uploads/short-url/17KePWjJEmus4gvpG0vuBHNUy58.log) (5.0 MB) [FortniteLauncher.log](https://forums.unrealengine.com/uploads/short-url/jQDasKF6IuhnOJaf8RwKYcloh52.log) (2.0 MB) [FortniteGame-backup-2025.06.16-08.35.41.log](https://forums.unrealengine.com/uploads/short-url/oHO5ZSQBsMegKxU6KXdzpngyFkX.log) (6.4 MB) ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [June 18, 2025, 10:41am UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/15 "2025-06-18T10:41:29Z")
Thank you, @BrendannnD ---
**Author:** ![thrax207](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@thrax207](https://forums.unrealengine.com/u/thrax207)\ **Post date:** [June 18, 2025, 12:05pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/16 "2025-06-18T12:05:14Z")
We have the exact same issue, especially this join / leave message instantly happening. @andrej / @Flak have you tested staying in the game for a while? In our game it takes 15 minutes for the session to get glitched and unjoinable with 8 players in the game. With 4 players, takes around 35 minutes. With 2, around 55 and 1 player 120 minutes. We outlined clear steps to reproduce if it helps: > [@\[CRITICAL\] Tycoon Unjoinable “Network Connection Lost” After 15min – Matchmaking Still Sends Players](https://forums.unrealengine.com/t/critical-tycoon-unjoinable-network-connection-lost-after-15min-matchmaking-still-sends-players/2562223): > > Summary Tycoon Island gets in a bugged state after 15 minutes playtime with 8 clients. If any player leaves, and a new one tries to join, he will never be able to join. The matchmaking keeps pushing players to the island, and each and every one of them will fail to connect. It completely kills any traction for our island so we have delisted it for now. Support would be greatly appreciated. Please select what you are reporting on: Creative What Type of Bug are you experiencing? Matchmaking S… ---
**Author:** ![BrendannnD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BrendannnD](https://forums.unrealengine.com/u/BrendannnD)\ **Post date:** [June 18, 2025, 7:57pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/17 "2025-06-18T19:57:09Z")
FWIW we both seem to be having this issue - [Validation error from outdated files in sys/versions (regression?) - #45 by ItsJacky](https://forums.unrealengine.com/t/validation-error-from-outdated-files-in-sys-versions-regression/2533332/45). Could be totally unrelated but maybe connected. ---
**Author:** ![ClickGamesFN](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ClickGamesFN](https://forums.unrealengine.com/u/ClickGamesFN)\ **Post date:** [June 18, 2025, 8:45pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/18 "2025-06-18T20:45:30Z")
FYI I also experienced that issue. ---
**Author:** ![thrax207](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@thrax207](https://forums.unrealengine.com/u/thrax207)\ **Post date:** [June 20, 2025, 8:59pm UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/19 "2025-06-20T20:59:53Z")
@BrendannnD any luck on your end? We’ve been doing extensive tests for past 5 days but no luck yet, outlined them here: [[CRITICAL] Tycoon Unjoinable “Network Connection Lost” After 15min – Matchmaking Still Sends Players - #7 by BrendannnD](https://forums.unrealengine.com/t/critical-tycoon-unjoinable-network-connection-lost-after-15min-matchmaking-still-sends-players/2562223/7) Is this behavior similar to yours? ---
**Author:** ![BrendannnD](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@BrendannnD](https://forums.unrealengine.com/u/BrendannnD)\ **Post date:** [June 22, 2025, 1:45am UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/20 "2025-06-22T01:45:30Z")
No luck here - you have definitely done much more extensive testing than I have. As a workaround I tried disabling matchmaking after game start but it hurt my metrics too much. Really need Epic’s help on this one but I haven’t gotten any meaningful update besides the team has my logs. ---
**Author:** ![thrax207](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@thrax207](https://forums.unrealengine.com/u/thrax207)\ **Post date:** [June 22, 2025, 10:19am UTC](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383/21 "2025-06-22T10:19:14Z")
Thanks for the update @BrendannnD . What you could do is delay matchmaking disabling after 15-30 min for example (not sure how fast your game bugs), but this might help your metrics a little bit more. Could you share content of the .uefnproject file, for example if your project is called ZoneWars, the file would be ZoneWars.uefnproject + could your share island settings matchmaking stuff? (Team size, team config etc) I am especially interested in the matchmaking what it says, trying to see if there’s anything off here. [Next page](https://forums.unrealengine.com/t/players-getting-network-connection-lost-when-joining-public-lobby/2514383.md?page=2)