In case anyone needs a solution to this:
The culprit is most likely ROBLOX’s garbage sleep system. The engine will try to “”“intelligently”“” put parts to sleep to be less taxing on the physics engine… the problem is that it is not even remotely intelligent. Not even a tiny little bit (what can you expect from ROBLOX?).
Try disabling sleep in your studio settings (under physics), and then if it still doesn’t work you can try out this module.
Farewell and good luck!