I have several synced files in my device. They play correctly, but the album art doesn't show, neither in the main player nor in the lock screen. It is worth noting that in the Windows Desktop player the album art does show, and if I open the file with Mp3 tag and iTunes, it shows that it has album art. Additionally Android apps for editing tags do show the album art, and if I copy the local synced files to another location in the device, apps like Google Play Music and Poweramp show the album art. It seems that the problem is limited to the Spotify app for Android. Is there any way to fix this, or is this a bug?

Sorry if you consider this post to be a duplicate, but I have tried the solutions in other posts talking about this problem and I couldn't fix it. Some post say that this is a bug that has been fixed, but if that’s the case, it seems that I is happening again.

Additional information:

Android version: 6.0.1

Spotify version: 8.4.19.792