My mechanical Doors rusted shut.

Could you maybe upload both of your save files before and after it happened?

Did this happen during a single play session, or after a save/load?

As @watermelen671 says, uploading the save files would also be helpful for us in this case. Thanks!

Good news. I still have them. I spent 0 seconds of my 9 cycles anywhere near the doors so I have no idea when this happened. But I did save/load at some point to fix my farm station. Basically the game was never closed but I did visit the main menu. I did have to save/load every 10 cycles or so to fix stuff during the beta. But in this instance I know for sure there was only 1 save/load between these save files.

Tragic Spacecamp Cycle 264.sav

Tragic Spacecamp.sav

Turns out I had something similar happen. I had mechanical doors that I went to deconstruct. As part of the deconstruct process, instead of dropping the copper ore, the door turned INTO copper ore (and entombed my poor duplicant). Perhaps there's a difference between deconstructing and deconstructing when the door is open? Hopefully this helps the developers.

Unfortunately it happened so quickly I did not get a save, but I was able to get a screen shot real quick.

 

Has recurred with a Manual Airlock