For a few days (as reported here as well, and IIRC not immediately after updating to 1405) I have started to occasionally get an empty album page when I click around in Roon. Not sure what the preconditions are, but I think it happens occasionally when I click the back button to return to My Albums from some other page.
Restarting the client fixes this, but more interestingly the client crashes immediately when I click Focus in this state. I can reproduce this crash every time and I have seen it both on macOS and on iPad. Most recent was just now, May 4, 00:34:46 CET (after midnight, 0:34 a.m.)