Bugs with High Pass and Low Pass Filter

Hi everybody
Happy new y(ear) all lol

Nobody have notice sometimes (not always) a bug with the pre HP and LP filters when you click on the button and turn
then release them ? The sound between the click and the release is not the same , i have to scroll with my mouse on the button to keep the sound the same .
It appears specially with the 12/24/36 db/octave and LP filter but it depends it seems unpredictable .

I have got cubase 8.5 , all turns perflectly apart this

I don’t think it comes from my computer that’s why i tell if someone else have this error /bug , that could be coming of Cubase simply