Changing child values result with UE crash

Hey guys,
Could really use some help over here.
I’m getting this error crash every time I’m changing a default parameter from a child actor.
For example changing the collision sphere radius of a child, or changing a projectile speed.
I can’t even put the actor on a level, same crash.

Assertion failed: IsValid(this) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Private\ActorConstruction.cpp]

Really can’t understand what’s the problem, I thought it was something about the construction script but it’s empty no code over there.

Edit:
I discovered something that might be a bug in UE.
I have an actor with sphere collision as root, with a Niagara system attached to it.
If I clear the system from the effect, then I can do any change I want without crashing UE.
So the crash happens only when I’m changing ANY parameters in the actor while the Niagara system has an effect applied to it.