Quest 2 - headset screens go black after a few minutes

[Glowingheat]

Since the most recent patch hotfix, my Quest 2 screens go black after a few minutes of flying.

Didn't happen before.  

Ran a repair yesterday after Malwarebytes quarantined the dcs-mt.exe

ANyone else seen this? I know my headset is old, but as I say working fine two days ago.

[Glowingheat]

Just to add this doesn't happen in the ST version, only the MT version.