Can't hide in-meeting notifications

Hi there!

I'm having an issue where some of my coworkers are unable to disable the notification badges or the pop-ups on our group zoom calls. I have no idea what is different about our set-ups!

I suggested that they select the "Mute chat notifications while I am in a meeting or internal call" option, but it does not seem to make a difference. Any other ideas on how to stop these notifications from happening on the mac desktop app?

thank you!