Removing the Rigibody2D fixes the issue! I am developing on 5.5.0f3. I have tried with 5.6 (which is still beta at the moment), but nothing changed. I have also tried to change the Rigidbody settings to Kinematic / Static instead of Dynamic.
I can't…
The 2D demo is working without jittering. Dropping the demo player in my game didn't improve the situation :( My camera is Orthographic.
Anyway, after updating to 1.56b the player wasn't working anymore, so I had to check and remove some useless / w…