Sound drops on iphone

In each zoom meeting I host, where I meet with two other people, they cannot hear my voice (and my voice only) stops for about 10 seconds.  My clients’ sound is not affected at all.  They can tell me they cannot hear me.  Video is fine.  Nothing is freezing up.  It is always for just about 10 seconds and then comes back like it did not happen.  It only happens once in each meeting.  It is never at the exact same time.  It is always when I am talking.  Never when they are.  I am on my iphone for these meetings. I do have a new iphone as of June.  BUT this did not happen the first couple of months I had the new iphone.  It appears to have started only after an iphone update.