I dont understand why i cant reconect to my ranked game

I sudently DC for no reason, internet is working perfectly fine, but for whatever reason when i attempt to reconect it appears me this https://gyazo.com/184b10fc1f971ec33c632f7597b1747c I honestly dont understand why am i going to lose 17 lp's and get 5 games leave buster punishment for something wich im not guilty of....
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