All songs from Maroon5 removed from my playlist

[-Gump-]

Plan

Premium

Country

 Canada

Device

Pixle 

Operating System

Android

My Question or Issue

All songs from Maroon5 have been removed from a single playlist. All the songs are current and have been put back on by me. 

Shuffle is absolutely pointless. It literally goes to the bottom of my playlist and plays all the Maroon5 songs back to back, then will shuffle the rest. 

What gives?

I have a bunch of playlists with hundreds of songs. Can't even begin to figure out if other songs or entire artists have been removed .

What gives Spotify? Why were all these songs removed?