Issue with call recording

I am rooted via Magisk in my OnePlus 5T running stock Oxygen OS 10.0.1 I cannot enable call recording. I cannot access the stock OnePlus call recorder app. When I press the record button during the call, it works. After the call end and I check my recording, it is a blank recording. i.e. there is no sound in it.

Even though I have allowed all ther permissions, I keep getting the notification

"Necessary permissions are denied. Please allow in settings. "

I have cleared cache and rebooted my phones many times but still I can't enable call recording.

Call recording app from playstore doesn't work either. The call recording turns out to be a silent recording again.

Please help.

 

I am not running any custom ROM. I am running stock Oxygen OS 10.0.1. It is the default ROM that comes installed on OnePlus 5T .

 

Yes it was working. I have been using this phone as rooted since 2018. I don't know what went wrong.

 

Bump...

 

I live in India. I have recorded calls on Android for several years here. There's no restriction here.