I have seen similar topics many years ago, but the problem is still here. A lot of my music does not appear “liked” as expected. Mostly on Android but I use Deezer on Android mostly so I'm not sure if it’s only on Android or not. And when I click on that heart it says the track is already in my favorites but still appears as unliked. Guessing that’s an old server-side caching issue that is ignored. Also, many tracks can’t load and throw an error or load too long, causing extra gaps between tracks. I think that could be the same issue. By the way, I’m in Ukraine so maybe it makes some difference. Yes, I did reinstall an application and tried Release and Beta with the same result. And no, all my Internet connections are pretty stable and fast so I don’t think that may be a cause. Since I have a free subscription for Ukrainians, I would like to help with debugging this issue. Maybe there is some debug version of the Deezer Application or someone can compile it with options to debug those issues with the heart icon and slow loading of tracks.