Local files from pc to phone via playlist are sped up

[Kortap]

Plan

Premium

Country

Germany

Device

Android 4.2.2

Operating System

Android 4.2.2 and Win10

My Question or Issue

If i add local files from my computer to a playlist and then download that playlist on my phone, these files are sped up. I tried redownlading the files and reinstalling spotify. Didn't work. I found some older posts  with these same issues, but no answers.

Video: https://youtu.be/MrjmdBoCpFE