Update: I also see they removed the artist name as well that would usually be under the song name...

Hello ​@Skies thanks for your post and sorry to hear that cover arts are gone.

Did it just happen with that tracks on your playlist, “J-Music”?

I just check through a web browser and I can see all the covers for the songs you share in the screenshot.

Could you try to clear the cache and if that doesn’t work, clear Data (option under Data and Storage in the Deezer app)?

If the issue persists, please delete the app, and reinstall it from the Google Play Store.

About your second question, I can see on my Android device, song name and artist.

What is your Deezer app version?

This is also a persistent issue on my other phone, which is Android. Considering I haven't done anything, I believe it has to do with the recent update. This issue was also highlighted by a staff member (they had the same problem). Please notify the team of this issue.

To further add onto this issue. The actual "My MP3" playlist is fine and looks like this: 

Once you add any of these songs to another playlist, they lose their album cover and artist.

I did all of this and the issue still persists. Seems to be a mobile/Android based issue, as there are no problems on desktop for me.

As you can see in my prior comment, album cover and artist still exist in the My MP3 playlist, but when you transfer any of the songs to other playlists, it ceases to have those details.

Please inform the Dev team and let me know if there's anything else I can do.