Maybe someone in your household has been banging on the glass or stressing the fish out possibly causing the jumping? Theres so many reasons for why aros jump but i think in this case hes been scared of people. I suggest you should spend time in front of the tank maybe on the computer or something until hes used to you. Im sure that its just a phase and it will pass even if you dont do anything. Weigh down the lids in case tho!