This was an interesting scenario that was happening to me today. I was playing with some friends on Warzone, and the game kept kicking me and just being generally laggy, and saying that I was no longer connected. The third time it kicked me, my friends were still in the game, so I decided to spectate. This is when I came upon the very weird situation of, as I was spectating my friends and scrolling through the active players, myself, in the game. I had my hands off the controller, and just watched the character play the entire match. Has anyone experienced this at all, or am I being haunted by the Ghost of REQ Packs Past?
screenshots plexz
Proof or it didn’t happen 
The theatre doesn’t recognize new players or dropped players. I had a friend join in progress and he couldn’t find himself in the theatre, but he realized the game thought he was the player who quit. It’s a dumb bug.