I sent them this bug months ago - even uploaded all of the supplementary files but there has been no acknoledgment since then. Anyway, it can’t hurt to try to get their attention through multiple channels.
To clarify: Before I use the WMR start menu overlay inside the cockpit for the first time, I hit the Esc key in order to go into the menu and pause the game.
After I have opened the WMR start menu once this way, I can reopen the WMR start menu freely without pausing the game.
I mentioned in another topic that this seems to be resource related where the initial WMR start menu launch will crash VR mode if there is not enough resources. I believe hitting Esc key helps with that and once it ran for the first time it’s not crashing for me anymore.
Let me know if this is still unclear.