Quote:I maybe moved the mouse little bit after selectingThis is the cause indeed. When snapping is enabled parts jump to their origin to the mouse cursor location when moving them as that location determines where it snaps too next.
When snapping is disabled you don't have the jump as grid movement corrects for the cursor's grab location.
I'll try to improve this in the next version by ether having a similar correction during snapping or by trying to decrease the movement detection sensitivity.