Make the collision objects (hands and character capsule) ingame visible, and you’ll see whats happening:
The hands are colliding with your character collision capsule (Thats the round big thing called “CapsuleComponent”) when going back to the body, thats why you’ll get the message for your own character.
In Picture 3 you’ll get 3 Messages (1x own character because see above, 2x other character) because the hand is punching “through” the collision capsule.
I guess.
Thats probably because your mesh gets pushed outside of the capsule because of physic.
Please make the Capsule and spheres visible and try it again / record it again.