I showcase it in the video below https://youtu.be/PdUkeD3AO2s
Hi, you don’t show Niagara emitter and system settings in the video, make sure they are set to loop infinitely. Maybe there is a fixed amount of loops.
If not maybe something related to bounds, but that shouldn’t be the case as you don’t move.
Also does it happen the same if you place those Niagara systems in levels normally (not as part of those Blueprints)?