Hello,
They should be ok as convicts are amazing parents (as i'm sure you know), but occasionally the stress can be enough to make them eat the fry.
If their a young pair then they may eat the fry anyway, due to them been inexperienced.
I have two pairs and the younger male always eats his fry after about 2 days of the fry becoming free swimmers.
Even if they do eat their fry, convicts are prolific breeders so it won't be long and they'll be breeding again.