Sorting broken

Hi team LT,

The last week we have noticed increasingly unpredictable behaviour when sorting our items in the different panels. Up to a point where it currently is not workable (i.e. unable to indicate priority to team members due to sort failure).

The problem appears to be restricted to certain panels in to our main project (#26f37a) which indeed contains many items (see screencast). We cannot reproduce it in a nearly-empty project.

KR, Ammar.