Niagara system not working until I open it and it compiles - still won't work in packaged game

I’m having the same issue in UE 5.4.3 and no warnings or errors in the logs. You can also reproduce the issue with a right click → reload.

  • Switch Loop Bheavior to Multiple with a Loop Count of 1 did not fix.
  • Change lifespan did not fix.
  • Set Bake Rapid Iteration Parameters on False did not fix.

I did other tests and on my side it’s as if it doesn’t manage all the array parameters until I open it.