1. Leave the Google Meet and select Rejoin
2. Adjust your view settings (grid, spotlight or sidebar) | Google Support Site
3. Optimize Google Meet for Slow Internet
4. Close other tabs running Google Meet
5. Remove Grid View Extension and Manage your Extensions
6. Update your Chromebook
7. Reset your Chromebook hardware
8. Try Guest Mode
9. Try a different device (Android phone, iPhone, or a different computer)