The summary of the lnitial Life Span says:
Note this is the INITIAL value and should not be modified once play has begun.
What would happen if I modify this value during gameplay ? Should I ignore this note ?
There is probably a reason for why it should be modified if it has a specific warning for it. I believe the reason is that the Initial Life Span will probably not work properly of function 100% correct if you tweak it during runtime. Why don’t you try it out to see if it causes any issues for you?
No issue for now, everything works properly.
For more context, I’m remaking Space Invaders to learn Unreal. When killing ships, there are falling bonuses that can be obtained by the player. If the player catch a bonus, the actor bonus is transformed as a passive during 10sec for the player (movement speed, projectile speed, etc). So I change the lifespan to 10sec. When the actor Bonus is destroyed, it removes its effects on the player.
I see! Best of luck with the project! 