This is actually an old bug, and it's not grave, would fixing it would still be nice:
When you host a game, then move (yourself, so the "human" player) to a different slot, then click the "reload last game" button, your player name will vanish off the player list (it is apparently overwritten by an empty string there). The game still remembers your player name, since you will be correctly named in the lobby and in-game chat and your name also shows up on the end of game stats correctly. So it is just lost on the player list (but should not).
