Could someone find any logic in the rigid body world and rigid body constraints behavior? I have a scene where I'm trying to find a logic for better understanding of rigid body world and rigid body constraints regularity. 

The setup seems work as I expected, but when I move the &quot;Vert&quot; object to the negative X direction or to negative Z the constraint on &quot;Empty.007&quot; doesn't move the &quot;Circle&quot; object and the &quot;Circle&quot; doesn't fall. I guess that happens when the &quot;Vert&quot; object gets out of the limits of the constraint. But I'm not sure because when I try to expand the limits it doesn't help.
Also I completely don't understand why the disabling the collision of the constrained objects (by &quot;Disable Collisions&quot; checkbox) in &quot;Empty.007&quot; makes the Circle object stay still.
And as you see I made a weird &quot;Vert&quot; object. That's because I didn't find a working way to bind the &quot;Circle&quot; object to Empty by a Rigid Body Constraint. Is it even exists or I must have a manifold Rigid Body for that?
Probably that are a bugs of Blender 2.83.6. It seems like all works as expected with Blender 2.91.