It getting stuck is most likely caused by friction, it can be overridden with a physical material.
I’ve tested this for a couple of minutes and it seems to work OK, without getting stuck:
Physical material:
- no movement / projectiles components
- simulate physics
- no gravity
- no dampening
- simulation generates hit events
vid: https://i.gyazo.com/943601e6623269bb…8697d8ffd3.mp4
… it may get stuck later, though - who knows. Still bouncing here for now. But the physics will fail eventually at very high speeds. At which point you will need to enable CCD and up the solvers in the advanced physics settings.