Not sure if this is a bug or if anyone else is having this problem but there are just Abandoned Buildings anywhere. I've visited nearly 100 planets in 3 different territories and there is just not a single abandoned building. I mean they used to be everywhere and now there is nothing
I’ve also noticed on a recent new playthrough of reforged galaxy 1.5, that they do seem to occur less often. But, I’ve also been able to consistently find them outside of a faction bubble, in neutral territory. Seems their spawn rate was reduced, but still findable.