Windows Mixed Reality, Unreal 5 and HP Reverb G2 headset?

Is there a way to get Windows Mixed Reality to stop showing this blue vanishing triangle transition each time I play from Editor? The editor shows the VR preview screen at once on PC monitor, but in the actual headset it always shows this transition that uses 2-3 seconds.

Very annoying when testing and debugging…

(I use HP G2 Omnicept, UE 5.2.1, Win11)