voice loopback - echo

[spectrum]

Hi Flora,

many thanks for your kind support.

1) i always use handset, it is with handset issue happen
2) i can try to mute / unmute when issue will happen again, it is not really repeatable.
3) issue happen only in some calls, sometime happen when i set the speaker on and off again, sometime happen just moving with handset but not clear how. Sometime seems also is disappeared moving handset.
4) i have 2.73.0.40
5) until now, it happen only with VPN seems
6) ok, i test with new version and let you know

Many thanks for now.