Network Issues causing voice to drop, but not always Video

I work from home and perform a lot of video/audio communication through GoToMeeting, Skype, Microsoft Teams etc.   I have been having an issue for months (almost a year) where while I am on a call my audio will completely drop, even when Video/Screen Sharing is still active (although sometimes even the video drops).   The voice loss can last about a minute and then comes back on.   When it happens, it usually happens all day long (for every 5-10 mins of up time, it goes down for 1 minute).  

I have the newest Xfinity modem.  It happens on ethernet and on wifi connection.   I have had a technician replace my cable from the pole.   Not sure what else I can do.   Not sure Xfinity knows what to do either.   Any suggestions?   Thanks.