javaminit,
I am just updating my iPad Pro to iOS v14.3 and will let you know. I assume when you say ‘casting’ you are referring to iOS ‘Airplaying’ to your devices as listed in the control centre device list (see attached screenshot example).
Meanwhile here is a general list of things to check to get Airplay working:
- Plug all devices into a wall outlet instead of using battery power
- Restart all devices and try to AirPlay again
- Toggle off Bluetooth, or if already off, try turning it on
- Turn off Cellular Data
- Disconnect from any other Bluetooth devices (like speakers)
- Connect to the same WiFi network
- Reset your network settings on your iDevice in Settings > General > Reset > Reset Network Settings and then reconnect the device back to the local main WiFi signal
- Update iOS, and speaker firmware/software
- Move your devices away from other electronics
- Renew your devices DHCP lease via the router configuration pages or reboot the router
- Switch off any security software and VPN software installed on the broadcasting device