Niagara skeletal mesh component problem

hello devs i set up with niagara a flapping birds flock using skeletal mesh component. I noticed that it works correctly only if I open the niagara emitter from editor before running the level. If I try to package the project it fails and I am pretty sure is related to this as I can see Niagara related errors in output log and if I run the game from editor or with launch game option (without opening emitters in editor) of 2 emitters just 1 is working and badly, basically birds goes straight forward like rockets without any noise or direction change applied… this make me think that is something related to CPU access that is not working without preloading emitter in editor. I know this feature is still experimental but anyone could help me? thaaanks