randomly 500 ping and then can't connect cause firewall apparently blocks the connection

So I was playing a ranked game when suddenly the ping went to 500 and I got attempting to reconnect. I was pissed of cause a fight just started and I could not help my team. So i quickly left to reconnect but I can't reconnect because my firewall blocks the connection. What is this BS, even when I turned it off it did not help. Ty riot for making me lose ;)
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