This is the way that Exo planets end/die, but I didn’t think Sov planets did the same. Especially since there’s suppose to be a 2 week (or so) time frame where they are locked - just incase someone forgot to add fuel.
I’m going to lean towards bug. Could be wrong. @james
Edit to add: anything that you placed on the planet will automatically go into a reclaim for you. You won’t see the reclaim until the planet is 100% gone/deleted though, which can take a couple of weeks unless you list your planet on this thread for asap deletion: [REMINDER] Extend or Remove Sovereign and Creative worlds!