Hi all, this is happening to us too, we are a call center office with Zoiper 3.14 biz version
We tried also 3.16, is happening in every version, please give us a solution, as Erik said this is not happening in x.lite for example
The thing is when we call from browser dialer the Level is forced back to 50%
We ve tried jack 3.5 headset and Usb - all same error