I've always had this issue with King of the Hill servers: I would get extremely low FPS (around 1 or 2) for a few minutes, then would get kicked, without any specified reason.
Now this issue only occured when playing on King of the Hill servers, and after 5 or 6 attempts, I would eventually be able to play. I've returned to normal branch when you released the Nexus Update, and yeah, the issue was still here. I assumed it only happened when playing KOTH. But no, now I'm not even able to play on official BIS servers, like Zeus or End Game servers.
I don't really know what to add, basically I get extremely low FPS for a few minutes after joining, then get kicked. No reason, never banned or anything of the sort. It has really become a problem now, as I cannot play on officials nor half of non-official servers.
I guess I should provide some bug errors, but where do I found them? In the launcher menu?