Hytale was bought back from Riot Games by its original owner after Riot cancelled the project, but this kind of thing is certainly a 1 in a million situation

Microsoft has a strange habit of doing it. They sold off many of the former FASA's IPs indirectly back to the original RPG source book owner by way of what became WizKids. They made a deal too big to pass up to keep Halo IP when they spun Bungie back out, but allegedly Bungie walked away with a bunch of their pre-Microsoft IP, even if they didn't see how to use it versus building something new with Destiny. (The fact that they've reused the Marathon brand recently seems proof.) Most recently, Double Fine left with all their IP.

(Outside of games, Expedia was a spin out that got an odd mix of old MSN IP.)