I did some testing today, and was able to play Dirt Rally 2.0 for 4 hours without having the problem.
It is not yet certain that it will not come back, but before it was IMPOSSIBLE to play more than 10 min without it appearing, so there is an obvious connection between what I did and this phenomenon.
I've played DR2, after less than 5 min I had the problem, as always.
Then I uninstalled Steam VR, rebbot the PC, test of DR2 => after less than 5 min I had the problem, as always.
In the PC's Oculus link software => settings => Beta tab => I unchecked "public testing channel".
This had the effect of starting the download of 10 updates, it asked me to remove my headset for them to be installed.
Right after these updates, I relaunched DR2, played for 2 hours without having the problem.
This afternoon I played for 2 hours again without having the problem.
Obviously, this is a problem with the video converting / compressing of what is sent to the headset, or something like this, but this is not a hardware issue.
Is it the fact that Steam VR hasn't been reinstalled yet?
I don't know, I will stay in this configuration for a few days to validate that it is indeed resolved as it is.
Then I will reinstall Steam VR to see if it is the installation of this software that is causing the problem (conflict with Oculus link?), Or if it is related to the version I had (version 24 it seems to me), then that now I am in version 23.0.0.43.517.
It may be worth it for you to try what i did.
This problem should also be reported to Oculus support, it is possible that they are responsible for the problem and that the resolution of this problem can only be done by them.