Mouse speed is randomly changed, and often

A bug that annoy me a LOT. A LOOOOOOOOOOT. So I keep reporting it :

Sometimes (several times a month, sometimes few times a day), my mouse speed is changing.
Let’s say for exemple it is set (in windows setting) on 10. Randomly, in a game or while I’m looking at the current map, the speed is accelerated. I now need to change my mouse speed in windows to 4 (it’s an example), to match approximately my previous speed.
Let’s jump few days forward. The same bug wildly appears, now it slowed it down a lot, and I, again, have to change the mouse speed setting in windows to 15 (also an example).
And it keeps again, and again, and again, and again, and again, and again, and again, and again…

I also mention this issue only appear on war thunder (none of the many games I have on steam or installed on my computer did it).

My hardware (if it can help) : Combo mouse/keyboard Cherry DW 9100 Slim Black.