Disconnections issues, around 5 disconncetions per 15 minutes of gam (without any internet issue)

So, as i said in the title, i have around 5 disconnections in 15 minutes. I've saw something on internet about the IPv6 that must be disabled so the game could work fine. So i disabled the IPv6 from my control panel and i've tried other games like PoE or CS : GO where i have no problems. But those DC problems remain in league and i have no clue about how to fix it.. HELP ME
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