I noticed a tiny yet annoying bug. There is an objective where you have to "have [x] bald dwellers in your vault". It doesnt count towards dwellers you already have (obviously), so I had to breed/attract new dwellers with the radiostation.
I did so once through the radiostation, and the objective went to 1/2 for me... but less than half an hour later it went back to 0/2 (I had quit and re-started the game in the meantime). Later that day I attracted another bald dweller, and the objective went to 1/2... and during another restart of the game it went back to 0/2 again. Eventually I just x'ed out the objective, but its still a bug worth mentioning nonetheless.