With iOS 14, Apple introduces local network privacy.
Beginning in iOS 14, the operating system will prompt the user for permission when an application attempts to subscribe to clients on the same local network in a relayed session. Due to operating system limitations, it is also possible this alert is triggered if the remote video host has a similar IP address (eg: 192.168.x.x).
If your application uses a relayed session, it is encouraged to add a descriptive custom usage string to inform the user why the application needs access to their local area network.
For more information, and options if you wish to force traffic through over the internet in order to avoid this message, read the iOS Known Issues page (https://tokbox.com/developer/sdks/ios/release-notes.html#known-issues).”