Thx for the hotfix, now it works again. One question - I found, that on Android 11, when DVC is on, some BT devices reacts to changes in EQ, some not (for example, WF-1000XM3, XB-650BT yes, my car SKODA Scala with MIB, no difference if BT or AA, not). I think it's according to the Android version, because on Android 10 with the same build (893 & 906), it worked, on Android 11 it acts as descripted above.
Not tested on the latest 907 build, will edit my post after some research.
And one hint, will be possible to give PEQ same function for DVC as in music player - DVC on/off for the specific device? This is last function, that I miss, because some devices are not able to handle wider sound ratio and need to switch it if off manually.
Anyway, great work @maxmp