Liberty Air 2 volume control problem

Hi Guys
I bought the Liberty Air 2 and everything works fine except for volume control. I use a Xiaomi mi 9 with miui 12 and android 10.
Any idea how to solve the issue? (Yes i did try to change controls with the app :slight_smile:

I could resolve the issue by resetting the la2 (pressing the case button for 10s) and repairing them!!