This is still happening, even in the June, 2019 desktop release. The top ribbon tabs become unresponsive. All other ribbon icons and features work fine, but you cannot select any other tabs unti...
This is happening to me a whole bunch today (June 2019 release as well)- I am working a lot with Power Query and almost every single time I exit PQ, the ribbon is frozen for about a minute. Nothing I do with the PBI Desktop window seems to make it work again consistently aside from waiting.