The main Power BI menu and toolbar are 95% non responsive / froozen when in the main power BI window when working with Relationships, Data, and Report. I have do no have this issue when using the Toolbar in the Power Query Editor window. Occasionaly I can get thePowerBI to be responsive by clicking to another application on a different monitor and then clicking back to power bi. All menu operations have to be via context menus and not via the main menu or toolbar. Drilling down to lower level object on a report or relationship will all a subset of the menus to be used.
The the shortcut toolbar is also froozen.
ALT key combinations do not activate the menu.
I am not logged into Power Bi.
Power BI Desktop 2.58.5106
CPU: i7-6700 3.4 GHz
RAM: 24 GB
OS: Window Pro Insider Preview 17661.rs_prerelease.180428-1349