the bodies do not collide and do not stop, but tremble

[MaxMinimus]

There is a strange problem -

a body falls onto another stationary body,
but it does not stop upon contact and does not fall asleep,
and trembles
and does not fully contact the lower body,
there remains a small gap, for example the square stands on the corner and not on the edge

and bodies pass through each other, but must collide

video:

1.mov