I have noticed that on a compiled project if you change the visibility of a UIR object, these changes are not reflected on the subsequent build. There are files that are set to recompile but in least some cases the change to the UIR is not reflected by a "build" (or Ctrl M).
Using the new "Rebuild" command from the pull down menu does reflects the expected behavior (the changes to the UIR are seen).
This may be considered normal operation and / or been previously reported, but it was new to me.