System volume decreases on meeting start

[aadilprabhakar]

Hi
I usually have a skype call going on in the background before starting a teamviewer meeting, as soon as I start or connect to an existing meeting; the volume of the skype call decreases.
Not only that, volume across the system reduces.

I am using MAC OS Sierra w/ latest TeamViewer (updated yesterday).

The problem has occurred recently, earlier there was no problem at all.