I was messing around in sandbox mode and found that if you deleted the ground above a Drecko while its upside down it falls to the ground upside down and gets stuck unable to move. I then repeated the same conditions except I had dupes dig the ground out from above it. The same thing happened. This occurs with both types of Dreckos.
So of course once I found that I had to try digging the ground out while it was sideways. This resulted in the Drecko getting stuck in the ground beside my colony's ration box.
Had a little trouble getting the sideways one to work the Dreckos like jumping to other platforms when theirs is destroyed so I had to clear out the area around the platform I put the Drecko on.
Edit: what are those random letters doing there at the end? It might have something to do with the URL I used to put the pictures in but I'm not sure.
Steps to Reproduce
1. Spawn Drecko on small platform 2. Clear out the area so the Drecko can't jump away 3. Build ladder to platform 4. Dig the platform out from under the Drecko while it is upside down or sideways or 3. Replace platform with gas while the Drecko is upside down or sideways.
This issue has not been confirmed by a developer yet.