Hatches don't fall properly

While playing I tried to get rid of a hatch in my farm. I let it burrow at night and queued a 9 priority dig to the sandstone tile it was borrowed.

This happened...

I tested it with sandbox and several spawned hatches. It seems that only if there is a natural tile below, then the burrowed hatch falls properly and unborrows to find a spot to burrow again. If there is a gap below it falls burrowed. If there are natural or built tiles to the right (more than one) it teleports to it burrowed (or even teleports to the right, one level below..)

I queued up some diggings and let it run several times with a little different results every time (save file attached)

* I don't know if this bug of the main game is also related