LeafyLuigi
This
DOES NOT
break popups that appear above the small menu. This will, however, break all notifications from the notification tab, thus rendering vote kicks and invites from others completely unusable. Group invites and friend requests will only work using the website.
This also appears to break sending friend requests and invites. I did not test sending group invites. Starting vote kicks appears to work.
I run Linux rather than Windows which may play a factor. In the case of Linux, having
ipv6.disable=1
in the kernel parameters causes the issues as described above.
Edit to add:
Disabling IPv6 will also spam the logs with the following or something similar, all within the same second:
Log - [Always] Websockets API lost connection: Socket closed
Warning - [Always] API websocket connection attempt failed (timeout=False), retrying in a bit...
Error - [WebsocketPipeline] Websocket exploded! An error has occurred in closing the connection. : WebSocketSharp.ErrorEventArgs
Log - [Always] Websockets API lost connection: Websocket exploded! An error has occurred in closing the connection. : WebSocketSharp.ErrorEventArgs