I've played 5 GW matches total, and in 2 of those I came across a bug where the lobby crashed, causing a desync in the match, after which both players could play as though nothing happened, and could still talk to each other, so it seemed normal enough. The exploit happens later in the match whenever someone should die; what happens is both players get a win, and if someone died, their commander is still alive, and is refunded the credits from the battle.
Does FAF keep logs when the lobby is closed? If it does, I can give logs, but I'm not seeing any that are timestamped properly.
EDIT: I just talked to Cresdee, who was the other player in the match mentioned in the second bug, and he said he got a win for the match too.