Random connection error on first connection try

[janlelis]

From time to time, instead of connecting successfully, I get the following error message:

WebSocket connection to '(signal tower address)' failed: WebSocket is closed before the connection is established.

Notes:

• It always works on second try (of joining the same room).
• The internet connection is stable

Unfortunately, I cannot reproduce this issue, but I'll add more info if I can learn more about it

[farao]

I see these on the server side as: "websocket error: closed". I improved the logging so that next time this happens also the request gets logged but this is the only additional information that I can print. I don't know if this is the server side "hangig up" for these occurences? I also can't reproduce it.

[farao]

I opened an issue with cowboy (the websocket library): ninenines/cowboy#1451

[farao]

Does this still happen?