Problem with motion reprojection since yesterday

[A.F.]

Hi,

I play DCS in VR (G2, RTX 2028 S).
I also use OpenXR toolkit.
Here I had motion reprojection activated (unlocked). I always had a good result.
Until yesterday: after 20 minutes of flight on an MP, my fps suddenly dropped to 10 frames.
After restarting and watching planes on other MP it happens immediately when I spawn.
If I then exit DCS and go to WMR Home, it takes about 6 seconds until the picture in G2 feels normal again.
Back on the MP and it starts all over again.
If I deactivate motion reprojection in OpenXR toolkit everything is fine.
Also in SP everything is fine.

Does anyone know the reason for this and can give me some tips?