Browser and Desktop App Favorites not synching

[Max_E_Million]

Plan

Premium Family

Country

Germany

Device

PC

Operating System

Win10 1803 x64

My Question or Issue

I listen to Spotify at work and occasionly add songs that I like to my library.

They show up in every other browser but not in my Desktop App at home.

If I want the songs in the library on my fatclient, I have to add them there as favorites.

Here's a screenshot I just made.
App in the back, current Firefox in the front.

The 3 top songs seen in the browser should be in the app too, but they aren't.

Tried Chrome, IE, Opera, same results.

First time I noticed this problem was 3 months ago or so.

Had a full OS reinstall meanwhile, problem persists.

This is so annoying, please help me solve this.

[violt]

+1 same.

Added music via phone.

Now my "Songs" sections are different. The Windows 10 is missing two weeks of additions.

If i add now aonther via phone it just adds on PC as well, but those missing are still missing.

How come there is no "clear cache" option. Obviously PC version has some caching issues here.