Problem creating new playlists on iPad App.

I have 597 playlists. I create one per album. I use iPad to create those, because the Web version is too tedious. I use the web version on computer to add the album picture to each playlist. Recently, when I create a new playlist, the system often freezes and wont create the new playlist. It creates a list with no tune. When I go back to the library, it now shows only 400 playlists. I cant go any furthef. My Deezer App is updated and no is my Apple iOS.

Each playlist being an album, they average 12 tunes each, therefore 2400 tunes in total. 

What’s happening. I have been using Deezerfor at least 15 years. Do I need to switch to Spotify ?