with festae you may need to drop the divider from time to time to protect one or the other, or just give them a break from spawning. and with this species its never a permanent bond, either one can snap one day and itll all be over. as long as th divider is in they can still see eachother so i wouldnt worry too much about it. you may have to work the divider again for a bit after you pull the fry. and the male is prolly just stressed or something. once you pull divider or remove the fry he should come back around