I have my sennheiser bluetooth headphones connected to windows 11, for whatever reason, 90% of the time, I move the slider on Windows 11 and it ignores complete

I have my sennheiser bluetooth headphones connected to windows 11, for whatever reason, 90% of the time, I move the slider on Windows 11 and it ignores completely the sound on my headphones, just great working products. I have to use the physical buttons on my headphones like a caveman