Has anyone out there experienced the issue shown below (in 10.5.0) or able to explain what might be causing it?
I'm displaying a single mapping cube, with data entry enabled, and axes set as below

With DownTotals checked it shows fine

Turn off 'Down Totals' as they're not needed/wanted with a mapping cube.

..and then everything disappears....and "BS line" becomes a column..

I tried restarting the service, went back to the screen...and on screen open it didn't even show the header bar.

If it can display it with DownTotals checked, then what would cause it to break when DownTotals is unchecked?