Summary
Hello,
I’m putting every issues in this single post because it seems like everything is correlated.
There has been more and more weird issues that there’s actually no way to fix on one of my map that is currently online.
It seems like this map is corrupted, even though I can play on it and upload it as usual.
Here are some of the problems I deal with.
- Shooting issues related to Mutator Zones:
There are many Mutator Zones on the map. Recently, I had to enable the “Allow Weapon Fire” option in their settings. However, once in a UEFN session or playtest, it was impossible to shoot. I deleted the zones, but the issue persisted.
I then tested in a remote area of the map that is usually inaccessible—specifically a spot where no devices of any kind had ever been placed—and suddenly everything worked normally. My only solution was to move the entire map geometry so the player doesn’t enter the areas where the “corrupted” Mutator Zones used to be. (I want to clarify that shooting is definitely enabled in the Island Settings and I have checked all other devices).
- Impossible to walk in certain sessions:
There is about a 1 in 5 chance that the player cannot walk forward. All input keys work except specifically for moving forward. The only way to move forward is to already be moving sideways (strafing) or backward, and then instantly press the forward key.
The only other fix is to respawn, which is inconvenient for players. I have tried everything: checking Island Settings, verifying movement speeds in Mutator Zones, etc., but it is inexplicable. There is simply a chance that forward movement fails, and that’s it.
- The HUD no longer activates:
I changed the HUD about 30 minutes ago to display the inventory for items the player can buy. Since then, the HUD does not appear at all, even though that is the only setting I changed!
The only way to fix the glitch is to open the Shop and then close it. This is not a viable solution, as I cannot instruct the player to open the shop to fix a bug (inciting a player to enter the shop would violate Island Creator rules). I even wrote Verse code to force the HUD to show, but it doesn’t work. Even removing the HUD Controller entirely doesn’t work. (The HUD is definitely enabled in the Island Settings).
- Player moves forward instantly at max speed (when it works):
When forward movement does work, the acceleration is broken. While the other directional keys function like in Battle Royale (progressive acceleration before reaching max walk speed), the forward key instantly projects the player at maximum velocity. It’s not a game-breaking issue, but I thought it was important to mention.
I am out of solutions and forced to write this message. I suspect this is a rare problem, as I haven’t seen anyone discussing similar issues on the forum. I have spent dozens of hours trying to fix this to no avail.
Is this an issue with my Verse code? Or is the island file simply corrupted? I really need to find a solution, as I have spent a massive amount of time on this project, and it generates a significant amount of revenue.
I also want to clarify that this is the only map where I ever had issues like these. I’ve made a lot of other maps where everything went as normal.
I am ready to answer any questions. Have a good day. 
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Other
Steps to Reproduce
Place Mutator Zones on the map and enable “Allow Weapon Fire”.
Launch a UEFN session: Shooting is unexpectedly disabled despite settings.
Delete the Mutator Zones entirely from the project.
Launch session again: Shooting remains disabled in the specific coordinates where the zones used to be (persisting effect).
Move the entire map geometry to a new, previously unused location: Shooting works again.
Expected Result
Players should be able to fire weapons according to Island Settings. Deleting a Mutator Zone should remove its effects immediately. Movement inputs (Walking Forward) and HUD initialization should be consistent 100% of the time.
Observed Result
The island exhibits signs of severe state corruption:
“Phantom” Mutator Zones block shooting in specific coordinates even after the devices are deleted.
Intermittent Input Failure: In ~20% of sessions, the “Move Forward” key is unresponsive (only strafing/backward works) unless the player respawns.
Movement Physics: When forward movement works, player accelerates instantly to max speed (no accumulation).
HUD Failure: Custom HUD often fails to appear unless forced by opening/closing a UI menu (like the Shop).
Platform(s)
PC (UEFN Session) & All Platforms (Published Island)
Island Code
4640-5664-1474