MV-22B … Parking break issue

Since a couple of month (it started way before SU15) I did notice some very strange "parking break" issues. It always looks the same:

• I am standing still (manual breaks applied)
• I engage the parking break
• The Osprey is very very slowly "stuttering" either forward or backward

I feel like this is happening more often when I have Live Weather and a strong wind is blowing.

Yesterday I had it again (and took some pictures, for what it is worth) …

• The parking break was active
• Nacelles at ca. 60 deg (read for takeoff on the runway) … with a pretty high throttle … dust was blowing on the runway
• Osprey stuttering backwards

… and once I release the parking break … it stopped to stutter backwards … and rapidly accelerated forward.

Perhaps this is a MSFS engine bug … but maybe you have an idea how to narrow it down.

(PS … If useful I can upload the pictures … but there is not much to see which would help to resolve the issue)