The host Audio stops working during a session. I have to log out and send a new sign on link. Help

HI everyone,

I am the Host and I send out a link to sign in. Everything is fine until we hit 2 hours then no one can hear me. I don't know if its my microphone or speaker. We have to sign out of the session and I have to send a new link to sign in. Then the audio works fine again for a while then continues to not work again. Has anyone experienced this? I am open to any suggestions please. Very frustrating since I'm paying for it. Thanks in advance.