It's not just the Galmap. If I'm in Starport Services, any screen in there, it's the same. I cannot interact with the desktop through Dash. The only time I can interact with Dash/desktop to pin windows, or do anything while playing Ed, is if I go to Dash/desktop from the cockpit of a ship, with no other in game windows/panels open.
Edit......
When I'm in the virtual desktop I can interact with all aspects of the desktop, open browsers, etc, pin windows, everything works as expected. Keyboard input works fine. This is provided I'm still in the cockpit of the ship, with no other windows opened.
Using the HCS voice command "Open Galaxy Map" when I'm still in the virtual desktop, I can see the window focus change to the Ed client window, and the Galaxy map pops up, which it should. From that point on though I cannot interact with the desktop environment at all. I can't open a browser, open file explorer, nothing. The virtual desktop is locked out when I'm in the Galaxy map.
When I then give the verbal command "Close Galaxy Map", the map closes and I'm back in the ships cockpit, and I have full control of the virtual desktop environment again.
Something in Ed is locking out the virtual desktop environment when any systems are opened, like Starport Services, Galaxy Map, and System Map. If any of those are opened while I'm in the virtual desktop, the virtual desktop is locked from any interaction.
What I'm observing is any screen in Ed that has a cursor arrow in it is stealing focus from the virtual desktop as soon as they're opened. The ships cockpit has no cursor arrow, just a blue dot that moves around with your head movement, so it's fine.