@Coutie This is how I can reproduce the the left eye flicker for 100%. I use a HP Reverb G2 with SS 50% in SteamVR and Motion Vector reprojection always on, RTX 3080 Ti GPU, 5900X AMD CPU, 32 GB RAM @3600MHz. I think a video will not help at all, because you will only see, that the left eye will become randomly black for a blink of an eye.
1. Select the Porsche GT3 Cup Car. That's important, because with other cars I can't reproduce it.
2. Select a track e.g. Brands Hatch GP, but for me the track doesn't matter. It happens on every track.
3. Select some AI's, all on Porsche GT3 Cup car. The more AI's are on track, the more it will flicker. I choose 19 AI Cars. With zero AI Cars there is no flicker.
4. Start a practice session and drive some laps with the AI. The flicker will start after 2 or 3 laps of driving. The flicker seems to be random. Sometimes you can drive a minute without it and sometimes it happens 3 times in 10 seconds.