There doesn't seem to be any simple way to get it to update..
In
WorldStateFrame.lua it calls
WorldStateScoreFrame_Update() which updates GetNumBattlefieldScores() and GetBattlefieldScore(index)
.. but it doesn't seem to work
I also tried a quick opening and then hiding the frame in this macro, but it also didn't work though
Code:
/run ShowUIPanel(WorldStateScoreFrame)
/run HideUIPanel(WorldStateScoreFrame)