I find something similar with the clarity. When I start a flight sometimes the visuals are off in the cockpit. Just not very clear. I move the headset around trying to make it more clear with no luck. Then after some time poof… I look down at an instrument and it’s crystal clear like normal in my reverb G2. Strange.
I think possibly your topic and my observation are related. Maybe the render scale is changing on its own. I’ll give your fix a try the next time it happens.