Me too when I paused a flight and tried to toggle back into 2D, instant CTD. But I I found a workaround that has solved it for me……when in VR and you want end a flight stay in Vr and go back to the main menu in VR. Then you can toggle back to 2D while at the main menu. That works for me every time. I’m using the latest WMR and open Xr developer (preview mode on), no reprojection, on a G2 headset.