All of a sudden, when I sign on to my Zoom account to start a meeting, my picture/video automatically gets pinned as soon as people sign on. I can't unpin myself and be in the full screen view on my phone. How can I undo this? It doesn't matter whether I am the host or not, it defaults to pinning my self view. I teach yoga, so I need to be able to see myself in a full view on my phone, while I watch the students on my laptop (which is also signed in). Thank you.