Visual bugs on large playlist

[hirotasoshu]

Steps to reproduce:

1. Open large playlist (for example, I have around 3.7k liked tracks)
2. Scroll down for about 30-40 tracks, mb more
3. Track progress bar is now "splited":
   
4. Playlists is also weird (3 local playlists)
   

I've seen bugs like this on old versions, but less weird -- only tracks counter was splitted (when it was numbers, not dots)

As I can see, it's happening only on really large playlists. UI acts normally on playlists with like 400-500 tracks