I hear others for 2 seconds and the the sounds disappears

[AnnemarieT]

Hi, 

When starting a call, I hear others for about two seconds and then the sound disappears. 
I have removed Zoom and reinstalled it but the problem remains.  
The set up of the speakers appears to be okay, otherwise I wouldn't hear the first coulple of seconds, isnt it?
How can I solve this?

Thanks!