Also for you it was a proxy problem, for me the screen turned black when using Flowlab for no reason, so I reloaded and all the player animations were gone
Actually it wasn’t a proxy problem, because it happened when using .school
But that’s weird. I don’t know If that’s a common problem or a regular problem.
Maybe look for people who had the same problem and see what the solution is. (or wait for grazer to respond)
I had this exact thing happen on one of my TD games. All of the objects had animations, and I went on to work on the game to find that all of them disappeared. I mentioned something about it on the forums at the time, never got a solution, so I ended up cancelling the project.