The same occurs for myself as well. I'm running the latest version on the GitHub. I've disabled all the plugins and it still occurs. However, on this forum, it seems to work fine.. interesting.

My console reads this:
WebSocket connection to 'wss://community.*.net/socket.io/?EIO=3&transport=websocket&sid=NQaX7qjgJhYbzRiiAAAT' failed: Error during WebSocket handshake: Unexpected response code: 400

Thanks for the support guys.

I'm actually having this issue on any mobile device that I try it with. It's very annoying.