ST/MT - Black screen randomly wiping out VR display for 5-15 secs during gameplay. HP Reverb G2

[TEMPEST.114]

Since the latest update in both ST and MT the game is now completely unplayable. Randomly the VR headset goes black for about 5-15 secs before coming back; during this the game is still rendering out the HMD to the monitor.

It was working perfectly before the update. 

It's not the headset because the headset works perfectly in other games and in the previous version. 

Happens in every airframe and every map. 

CPU is bound in MT.

8700K oc @ 5Ghz, 64GB Ram DDR3, 1080ti, 1TB m.2