I have this exact same issue as well on my base right now. I think OP forgot to explain that, the only action available on the lock is "Detach 4-dial combonation lock." Its as if we never chose a code, and when we put the lock on a gate or door, it thinks the lock is unlocked and able to be removed.

I have been experienceing this as well with gates and walls.

I have this exact same issue with this style of building.