Yes, If I first make or receive a call and then connect AudioRelay then there is no issue.
The issue arises when I have already connected AudioRelay and then make or receive the call.
I try to Disconnect/Reconnect AudioRelay but it does not fix the issue until the call is disconnected. Even Force Stopping AudioRelay does not fix the issue, once it is muted it stays muted until call is disconnected.
I don’t think it has something to do with my device only otherwise it would not have worked alongside at all in this case(Call 1st and Connect AudioRelay 2nd), maybe when the phone call is initiated it blocks all Background music playing apps(vlc and mx player etc).
*Note:** You can play back the audio data only to the standard output device. Currently, that is the mobile device speaker or a Bluetooth headset. You cannot play sound files in the conversation audio during a call.