Harris' injured hand is magically unbandaged and unharmed between two scenes where it's bandaged.
When Harris is sitting on the toilet contemplating whether or not to swipe right on a new girl, every time the camera cuts to a close-up of his phone, the reception bars constantly jump from 1 bar to 5, even though he isn't moving.
When Harris is late to work, his excuse is that he put his phone on silent, so didn't hear his alarm. His manager accepts his excuse, but phone alarms will still sound even if the phone is on silent. In fact, some phones will still alarm even if the phone is completely switched off.
Despite the fact that Riley has started to affect his work life and is constantly trying to contact him, he never takes any measures to block her number, which would have solved many of his problems.