Audio failure during zoom calling on cell phone

[CindyPCR]

We've had a recurring issue over the past year of using zoom where call audio is lost when we make calls or receive calls from the zoom app on our cell phones with another zoom team member on a PC.  The call is not dropped however we can't hear anything for long periods of time.  Audio does come back after a long period and then it will continue to happen.  This happens every time and we cannot complete the call without using our personal cell phone to complete a call instead.  This issue does not occur when we use zoom from PC to PC or when using the zoom app via cell to call an external phone number.  Wondering if anyone else experiences this issue and how this may be resolved.