This may or may not be a bug. It is a mystery, at least to me. In the past I used to see an occasional game in which one of the players did not appear on the game’s user list. I assumed these were unregistered bots, since only bots do not appear in the list, as far as I know. In one case I still think that was true, because the player’s name had “bot” in it. I have previously made a couple Forum comments about this. However, in the past few months I have seen this happen with greater frequency, and in at least a couple of these recent cases it was very clear that they were not bots, because they were losing games and making elementary mistakes. Has anyone else seen this? Is there some elementary explanation that I am ignorant of?
Admittedly, it’s a trivial bug even if it is a bug.