Dummy disappears when unanchored

I have no clue what is happening here. I was making a custom character system and when I parented the character’s dummy, all the player parts disappeared unless it was anchored. After that, I completely removed everything in my game with nothing but a baseplate and a fresh dummy added from the Rig Builder plugin.

The problem had nothing to do with my scripts. As you can see in the video, when I unanchor the dummy, all the body parts disappear. Has anyone else experienced this?

EDIT: This happens with any unanchored part, so instead of falling it just disappears. I fixed it by copying everything over to a new place. Annoying bug.

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It’s falling through the world. Roblox physics has a weird property where if something is unanchored and (maybe, not depending on) CanCollide off, it will fall through the map… I’ll let someone else provide an answer but that’s the issue.

It wasn’t falling (or it was falling so fast that it just disappeared), I verified this by printing positions, which were always the exact same and went straight to nil when unanchored.