Microphone/Speak don`t work in android sdm660

We are using Jitsi meet in our device for customer service. Our device is android sdm660 and we are getting issue.
It works well on phone to phone, phone to web, web to web. Issue is just on our device-sdm660.
Once any phone or web is connected to our device, we cannot hear or speak on both sides.
Anyone has experienced this issue?
If so, please let me know,
Thank you.