Ok I don't understand what's exactly going wrong but I'm using curd on Windows and it doesn't update progress when I complete the episode. As you can see in the image I watched episode 5 but it says "latest watched episode: 4"

The thing is - this problem occurs only when watching this particular anime (https://anilist.co/anime/176063/) and everything was fine when I watched previous episodes. Also I checked some other random ongoings and couldn't replicate this problem.