Razer Huntsman Elite v2 sound button not working

Hello
my top right sound volume button dont work correctly since always
when you turn left or right the volume dont change much.
I try to explain better
when you turn anticlockwise sound should go lower but he go up and down ect a little i cant really go from 40 level to 0 level
it keep doing like 38 40 42 then 36 40
Same things clockwise when the volume shoudl only go up

all other key from my keybord fonction great
and i really love this keyboard
it dont seems i can remove this button to see under
its not like all other button form this Keyboard

If soemone have faced this or can help
It will be greatly appreciated
Thanks to you all and a wonderfull day

Tylouh