Child components not in correct position

Hello everyone! I’m strugglin with this problem:
I’ve an actor in scene, this one is in the position I want it to stay, BUT…
When I make that actor child of another actor, I don’t know why this child goes so far from the main position…
I hope this information is enough to understand this problem… Thank you so much!

Are you using “Attach to Component”? If so, what attachment rules are you using?