Saw a similar story and decided to share mine.
It happened when I was working at my first job. I was 17 then. It was during COVID and during the first months of lockdown. I worked in a school tuckshop, helping to sell snacks and food. So for the months we were in lockdown I still got paid a salary every month, I was surprised as I thought I wouldn't get paid during the lockdown, so when I got paid I made sure to thank my boss. After lockdown there was an event for the teachers and I was asked to help prepare even though it was past my working hours and not the responsibility of the tuck shop. I worked for 4 hours more than my working hours for 2 days. It was a tiring, thankless job. So at the end of the month I noticed I didn't get paid for the extra hours that I worked so I sent a message to my boss asking if I would get paid for the extra hours I worked and she said we would talk about it the following week in her office and when she called me she said that because I got paid during the lockdown the extra hours I worked were to cover what I got paid during the lockdown and I didn't work enough hours to cover what I got paid for during the lockdown and she said she was disappointed in me because I was only working for the money. I got home feeling bad because she hired me when no one would because I was a foreigner and I was grateful she hired me and I felt guilty and sad for asking, because I thought I was an ingrate. I told my mom about it when I got home and she went and tore my boss a new asshole and forced her to pay me what she owed me. I left that job a few months later.