I have the feeling their season is over too.
I also get the feeling the intruder is one of the original owners of that nest. Or there could be two intruders and we’ve only seen one at a time.
I got a good close-up scap of the female today and compared it to the original female - - not the same. And we already know it’s a different male.
Well, that does explain the persistence. I guess these two are saying, first come, first served. LOL!