All songs in playlist gone?!?!?!

[uniquename]

I made myself a playlist with a couple hundred songs of my favourites, took quite a while. I logged in the other day and it's just empty...

Not deleted, so I can't recover it, just empty... I even had all the songs downloaded on my phone and I just checked and logged in and they were all there, then when i clicked the playlist they just all disappeared as well.

It's a pretty infuriating bug... Is there any way to roll it back? I'm even skeptical to make a new playlist now if they can just clear themselves, what's the point?!