Lately I notices that the amount of songs in my playlist are different on my mobile phone then on my desktop. When I browsed the internet, I came across a topic from 2014 where they said it could have something to do with "unavailable songs". When I enable showing unavailable songs on my desktop, it's the same amount on my phone. However, when I turn it off on my phone, it stays the same. On PC it does change to the correct number.
I think it is a pure mobile problem. I tried updating, reinstalling the app and restarting my phone but none of these things change. On other devices like from friends or family the same issue occurs.
Even though it's not a big issue, it's a bit strange.