While sitting in a station moving at high speeds, the quickmenu becomes unusable. If you manage to open the big menu, it drops in the world and does not follow you.
You can see the problem in this short clip, when moving fast the buttons cannot be clicked until the vehicle slows down enough:
Since the menus are rendered in their own separate camera, a good solution might be to keep the menu and menu camera at the world origin, then apply the correct local/relative offsets to the camera, hand positions, etc. This would have the added benefit of being immune to floating point precision issues when far away from the world origin.