If a match or selection within a combo or system bet is voided/cancelled, the entire bet will continue with recalculated odds based on the remaining bets within the slip.
If your remaining picks all result in wins, you'll receive winnings based on the recalculated odds excluding the cancelled match.
If one of your remaining picks results in a loss, your combo bet would result in a loss.
If you had a combo with 2 selections and 1 was cancelled, and the single bet went onto win, you'd receive 25xp (for every 1 coin bet) rather than 50xp.