A blueprint of a station that refuses to save edits.
The sector itself is fine. If I moved the station to somewhere else, then spawn a new station in it's place, the new station can be edited and will save in the database or blueprints as normal.
The bugged station that was moved to a new sector still had the same issue in the new location. Spawning a copy of the station and it was still bugged. I saved the station and spawned it to my test server and the station was still bugged there.
I've seen this same thing happen to stations and ships in the last few weeks. The only way it seems to fix it is to unbuild the station (or ship) completely and start again. A blueprint of the entity will only spawn in another 'bad' entity. I suspect it happens when the entity is edited while there is a chunk load error in the entity where part of the entity has not loaded.
load-exit.txt are the lines of the log file from my test between loading and exiting the game:
What caused it to happen is unknown, keeping priority on high since we don't know what caused it