That happened to me a few months back, had over 2k of commission due from aces high which was wiped off – made no sense at the time as the, if the player had won you would expect it to go negitive (in the casino rev anyway).
When I enquired about it, they informed me the player was committing fraud as such they removed the player’s account. I’d say check with your rep to see if this is the case with you.