The stupid annoying buzz sound and the unfair LeaverBuster

I was playing as Kayle in Blind Mode and I was hearing some buzzing sounds while I was playing. Then I have to turned off my league of legends and again I could hear the buzzing sound. I played while the strange noise was buzzing in my computer but then my wifi turned off. It took time to reset my wifi but then when I tried to reconnect the game was already over. I had left a lot of games early of One for all , so my time for LEaverBuster had increased for 20 minutes. In was unfair that I had to get LeaverBuster.