Random Multiplayer disconnects

Today I was getting disconnected at random, thought "ah, ok, must be a bad WiFi connection" but upon looking at my disconnect message, it appeared to be something else, an error in my MC client, I asked on the IRC channel for the MC server that I was playing on and was told that it was a Mojang level bug and that I should report it here on the Mojira. I attached a screenshot of the disconnect message