So, I've been seeing this for a while now and it isn't so much a problem as it is weird. If I am logged out and try to use the log-in at the top right gameside on chrome (or if I'm logged in gameside and try to use switch at the top right on chrome) there are several nations in the suggestion box that I have never tried to log in to. Some names I have seen there I don't recognize at all, but one that I saw on there today was a nation in my region that I did look at yesterday but did not try to log in to. It is not my nation at all, but another player in the same region.
I'm sure it is just a weird cookie problem, but I also can't help but worry that somehow that name is ending up in my log in box.