I don't know what's causing this, but at random times after a server restart, warps completely reset and disappear. I'm using the version for 1.10
Thanks for any help!

Closing as I cannot reproduce the issue without additional input.

Are there any error messages visible in the console? Could you test with the latest development build ?

Is there any pattern that involves the disappearing warps (e.g. they where created/updated shortly before the restart)? Can you check if these warps are written to the database?