Your location makes your timing different, but this time of year, I expect to see "suicide swarms"/absconds. I had one show up at my house last Friday at 4:50 p.m. The cluster was about baseball sized. I put them in a nuc box, and as soon as it was light the next morning, they took off. I did find a queen and a few bees balling her (protectively) in front of one of my hives about 20 minutes after that. I can't say for sure she was part of that swarm, but the bees in the functioning hive were not paying attention to her and that hive has a marked queen. I put those bees and queen in another open hive with old comb. I'm going to check this morning to see what is going on.
My general experience with these late season "suicide swarms" is that they are very dysfunctional and they will not stay put regardless of good comb and feed. Has anyone else had similar experiences?