I have an issue with static physics object which moves when I collide with many other objects.
It looks like a rounding issue (the movement is only a small jitter) but I'd like to check I've not made a mistake here before submitting it as a bug.

I even made the static object a very big mass, but doesn't help.

The same behaviour exist for different bounding polys on the sprite.

It's a bug. You should report it to them.

I've been experiencing the same issue. Definitely a bug I think...

This is a side effect of an attempt to reduce flicking in axis aligned sprites that are scrolling across the screen, it snaps the sprite to the nearest pixel. I'll add a command to turn this off per sprite as it is clearly interfering in other cases. For now you can force it off by giving the sprite a very slight angle, say 0.0001 which means it is no longer an axis aligned sprite and so won't be snapped to grid.

Thanks for the workaround Paul!

Good news then. So no need to register as a bug?