[Bug] Copy/Pasting Models With Teleporters Breaks Edit/Play Mode

The title describes the bug: copying and pasting any model that contains a teleporter effectively breaks both edit and play modes.
In this bugged state, existing parts will be affected by collisions and gravity while in edit mode, but will still be editable; parts added in this state will also behave like this once play mode is activated.
Additionally, play mode and edit mode are functionally identical now, and restarting while in play mode does absolutely nothing.

Note: I apologize for the quality of the attached video; I had my OBS settings very low for testing and forgot to reset them. I can provide a higher-quality video if necessary.

https://github.com/user-attachments/assets/0180e1c5-5d17-4b4b-be35-2b65447230aa

Reproduce the issue by copying and pasting a model containing a teleporter, then compare edit mode, play mode, collisions, gravity, and restart behavior. Done means copied models no longer make edit and play mode functionally identical, and restarting play mode works normally.

Written by the indexing model from the issue text.