I found this when testing: https://www.ventismedia.com/mantis/view.php?id=20486

Which View is being used when this happens?

Yes. It works properly in the 5.04 release, but not in the latest beta.

Are you seeing this on the latest beta?

Select either Album or Artist view from the left panel tree. In the main panel, right click on the album title hyperlink and select 'Play Now'. Nothing happens now.

Previously, right clicking on the Album title hyperlink would automatically select all tracks in the album and populate the 'Now Playing' section in the right panel. That is not happening and hence, 'Play Now' is having no affect.

The expected operation is happening correctly if I right click on the Album image rather than the Album title hyperlink.