Altered NPC Character Definitions do not work with NPC Spawners without resetting UEFN/FN

Has your issue been resolved?
Here’s what I’m running into:

  • The first time I run the project with Launch Session, all NPCs behave normally.
  • But after I simply Push Changes or Push Verse Changes and re-enter the game session, no NPCs spawn, and even pressing a Button that directly triggers the NPC Spawn Device can’t force them to appear.
  • If I Exit Session and then Launch Session again, everything works, but that’s a huge hassle when debugging Verse.

This problem is almost impossible to reproduce on demand—I can’t find any clear cause. I’ve seen it in two projects so far. In one small project I fixed it by deleting all the NPCs and setting them up again, but that solution doesn’t work in the larger project.