I have a layout with a container field and a portal, when ever I scroll on the portal the "empty" container field changes to show the background from the layout.
I have included "before" and "after" screen shots to demonstrate what is happening.
It appears to be related to the new "In Focus" option in FMP 12, as the same thing happens in Layout Mode when I select this option. Interestingly, it doesn't happen in browse mode if the container field is populated with data i.e. a picture in this case.
Any help would be much appreciated.