Previously, a player who continues to play was a commander, but not now, however, the indicator continues to indicate that there is a commander.

Looks like a bug

Hello @Chory

Thanks for pointing this out! It'll be passed on to the team!

I think this occurs, when a player changes class, without having died.
It doesn't really change class until it dies or until it is replenished in a supply box, but the game interprets that it has.
As if that kind of player, reserve it so that it is not occupied by another player.