Jittery movement in pixel perfect game

Godot Version

4.3 dev6



I have a pixel perfect game (480X256) that has 2 moving platforms in it.
When I stand on one of the platforms, the other starts to move in a very jittery way, and I don’t know how to fix it.

If it helps, the stretch mode is “Viewport”, the aspect mode is “Keep”.

If you have an additional information you need, let me know in the comments