You might be able to get the scrolling gallery to refresh completely by regenerating your token, but I'm not sure. When you first generate you token, that's when your already active listings get 'Auctiva'd', and have the scrolling gallery added - it might cause all that to happen again if you get a new token (My Account > eBay Settings > Get new token), but I don't know for sure as I have never had to do it.
Might be best to log a support request.