
I was playing with physics nodes and made a simple Marble Machine but using HingeJoint and activating motor I realized that it stops and restarts spinning every 360°.
This happens only using Bullet Physics engine, switching to Godot Physics the motor spins constantly.
It's a bug or features?
I made anyway a video, in the second half I explain how to reproduce.
edit:
I opened an issue
https://github.com/godotengine/godot/issues/18351