Yes I got that
However I am not using the "Watch TV Activity" (programmed it to start AVR, TV and Airtel DTH) much for one very specific reason.
I have an HDMI running from ARC of TV to ARC of AVR since I consume a lot of content on TV directly (in HDMI setup I use imput to be Cbl.Sat if AVR is in Stand by, this also helps me to watch TV without powering on AVR).
If I power on TV and AVR together, the AVR fail to shift to the Cbl/Sat sound and the sound starts coming from TV.
In this case if I individually restart AVR the sound immediately start coming out of Speakers thorough AVR.
This is a very know problem and is being discussed across many forums.
So what I do is individually start TV first and then Power on AVR ensuring I dont need to restart AVR again because of sound. If I follow this sequence, I have everything working in place.
Coming back to the original problem,
just discovered that even if I dont power on system using Activity, if I highlight activity on Remote.. I can control the Volume of AVR by Volume Button.
So in a way this is sorted.