I was entering a CC. I worked really hard on my entry, but I wanted to continue it later, so I decided I would click “remix” to save it. Somehow it had logged me out of my account, so I had to log in before remixing. I logged in, and it opened up the remix as a new project, not as unsaved changes in someone else's project. The problem is, it deleted all of my costumes (it was a WIP animation). All of my costumes were there, but they were all blank. I zoomed out, zoomed in, and turned it around, frantically looking for my work. I added a

 show 

block and clicked it; closed out of the project and reopened it; and restarted my browser then opened the project. Nothing helped.

Long story short: Saving my work deleted my work.

Ironic, right?

*UPDATE*

It fixed itself. As of recently, though, it has come back. Now my costumes are not blank but the sprite still fails to show up on the screen. Please fix this glitch.