The replay management seems to have a bug with the newest UI update. It does not rename / delete the file selected and shown on the right but some other (random?) file. I had that multiple times now but cannot really identify any systematic behind it
I can also confirm this is happening to me, since the new UI update. Replays that I delete will disappear but when I exit the game or just leave the replay management screen and come back, most of the replays reappear and renaming seems to select the wrong replay (i.e. select trackname r1 replay to rename, actually renames trackname q1 replay).