@globalnet
The pink flash is not oculus related. You have to reduce your draw calls, try object detail 1.
I get no pink flashes on heavy loaded airfields in Singleplayer campaign with these settings:
https://forum.falcon-bms.com/topic/24168/vr-best-settings-for-visuals-spotting-and-performance-on-low-spec-hardware-1080-ti-and-10600k