There seems to be an issue in the vanilla game where rebuildable doors equipped with a combination lock sometimes will have their slot stay locked after removing the lock. This happened on my server after the last "1.30 Patch 1" update.

I had to write a script that would force unlock these slots without a combination lock.

It may be that it only happened on this update due to some changes and corrupted variable but thought it worth reporting anyway.

While my server Reclamation Nasdara is modded, we run no changes to any relevant parts of the code with combination locks or houses.

Build a rebuildable door and add a 4/3 dial lock.

Over some restarts or possibly updates the lock slot can become bugged.

Remove your combination lock as normal and notice that you can no longer add the lock back to the door.

When a lock is removed the slot should become unlocked.