Hello, I’m not entirely sure but I believe it’s related to console clients, some of the clients reconnect to the IP they’re linked to, and I believe this is what players refer to by that.
Also, I don’t really think so, to my knowledge the “search username” is tied to the leaderboards, but that may be wrong. The best way would probably be to “follow” players’ profiles that you wish to see, so you’re able to view them at any time rather than having to scroll through the “members” page.