NPC's causes server huge server lag in public sessions

Summary

After the Fortnite 39.00 update , all of my AI-heavy islands that use custom npc_behavior scripts combined with NPC Spawner devices began experiencing extreme server instability by causing delays during the elimination process. These islands were 100% stable for over a month prior to 39.00 with no Verse changes on my side.
The delay that occurs when the NPC is eliminated is what causes this lag in maps from what I seen

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Devices

Steps to Reproduce

Create and Use a NPC definition on an NPC spawner device
Create a verse code that has functions linked to the NPC spawner device
(such as .DamagedEvent() )
Link it to the verse device
Make a PV code, have at least 2+ people in that island and continue eliminating the NPC

Expected Result

When eliminating the NPCs in the long run of a server, no delay should be expected

Observed Result

When eliminating the NPCs in the long run of a server, it will take 2-3 second to actually regsiter and play the animation of the eliminated NPC.

Platform(s)

PC

Island Code

0243-3963-9174

Video

This issue is affecting my map (1316-2698-6957) as well.
Players are reporting the lag can be usually found in servers with at least 60 minutes of session time, which makes me think it could be a garbage collection issue.

2 Likes

FORT-1036153 has been created and its status is ‘Unconfirmed’. This is now in a queue to be reproduced and confirmed.