Alexa isn't synchronised with Spotify. Wrong Songs get shown, and music stops playing

[MrSchugga]

Plan

Premium

Country

Germany 

Device

Alexa Echo Dot 2. Gen

Operating System
Windows 10

My Question or Issue

 When I start playing music over alexa, I can see the song playing in my Spotify App on PC. But when the song is over, Alexa plays the next song, but in the App, the song does not show up. And it last at the last song played.

[MrSchugga]

I think I found the answer... Deactivate fading if you have the same problem.