I don’t have much experience with this, but it looks like your cull reaction is “Asleep and clear”, I think what you are looking for is just “asleep” so that the system doesn’t reset when in view again
If you do want to clear it tho, you will need a separate setup, probably in BP, that detects that the system as been “looked at” by the player already, and when that happens have it set a user parameter Boolean on the system that you can use in the module that animates the particle, to switch from the animated value to a static one