Hrm, I’d have to have you run more tests before I can get a bead on why this is shifting. Since the box has no collision it can’t be influenced by anything.
Check the relative location of the box and it’s world location and match the world to the parent and verify if the issue is purely visible or if the component’s location is actually shifting. This might help us determine what’s causing it, and maybe be able to find a bandaid. The boxes aren’t physically simulated right?