I change the state of an issue in a sprint from "open" to "done" (drag and drop) all the issues dissapear from the board (open, in progress, done, all of it). I've seen a post that is similar to my problem but only with the 'Fixed States'. On the top of board says "x unresolved issues not visible on the board".
I got to the point to backup the database and reinstall the server but nothing has changed.
Can anyone help me?