I'm not sure what to suggest really - maybe you could try some Peer.js examples like https://peerjs.com/examples and see if they exhibit the same problems. I'd assumed that WebRTC was basically fine now and people wouldn't have any connection issues with it :(
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I'm not sure what to suggest really - maybe you could try some Peer.js examples like https://peerjs.com/examples and see if they exhibit the same problems. I'd assumed that WebRTC was basically fine now and people wouldn't have any connection issues with it :(