If I were you I will wait and see what happens.
I'm 100% sure we need to scan both sides and back side should bear photo shop name, date, your name, your date of birth etc...
Since you didn't receive your AOR, that means they haven't reviewed completeness yet. I'm sure the agent will find out your photo has an issue and either send you an ADR to request a new photo, or just reject (unlikely).
But don't worry, as IRCC state, applications rejected due to incomplete will be consider never submitted. The worst case is you resubmit. But again, I think an ADR is more reasonable solution.
I'm just guessing so you can always call IRCC to ask what to do. Good luck!
Thanks, I will see how it goes