This is getting Old

In the last month 3 times during Zoom meetings my screens start blinking on and off and disrupting conversations with others. The advice given by Zoom is not relevant as I do NOT have a NVIDA graphics Card.i am paying for service and this is impacting my business

What can i do to resolve this

I joined a Zoom meeting using my cell phone and dialing a number from the Global Dial-In Numbers list.
Once inside the meeting, DTMF commands like *6 to open and close the sound and others functions, work normally.
After that, I add a number to my cell phone call (so I pay the call costs). After merging the call, we can normally hear what is said in the meeting. But DTMF commands no longer work, even if I disconnect the other number from this personal conference. The DTMF features only work again if I end the call with the zoom and call the meeting again (Global Dial-In Numbers).
I would like to know how to make the dtmf commands keep working even if I add a person to my personal call.

Hi! During a training session with participants in Mongolia, several of our participants no longer had the breakout room icon. They were also unable to find it by clicking "more." This was true of users on phones as well as laptops. One of them even left the meeting, completed an update, and joined the meeting again. Still, no icon. We use the self-select breakout rooms, and the majority of our participants did not have this issue. 

My company has a zoom pro account with 2 licenses / users.  I am the owner, and the other license is an admin.  When I schedule meetings for the admin user, he can join but the invited guests cannot - it says "waiting for host to start this meeting".  We need to be able to host separate meetings from our licensed accounts at the same time.  Why is this happening and how do I schedule meetings for his user account that will work on his own?

I have not been able to find anything to assist in scheduling and it's getting emergent.

Thank you!