DCing every single night in this game but no other games, around same time every night

As the title says, been DC'ing in this game since about a month ago every single night at about 12:25ish Central Standard Time. It takes 1-3 minutes to reconnect to the game, but during this time, my internet is fine. I can go watch youtube, browse the forums, watch netflix whatever. My internet itself does not go out. AND, to make it even weirder, it only happens to LEAGUE. Does not happen to me in any other game. WoW, Dota, Hots, Overwatch, CS:GO, R6 Siege, whatever you can think of. Iv'e played it during this time and do not DC. This is a LEAGUE ONLY ISSUE> I repeat, LEAGUE ONLY ISSUE.

According to some other posts, they say it is a routing thing going to Riots servers, their internet does not go out, but they get DC'd from League. But it was on the oceanic side of things with a certain ISP that they have.

I have Cox, 100 down, 15 up, about 15-20 MS. Wired, Nighthawk Router. Again, WIRED. Not wireless. WIRED. Just needed to clarify that before i read a single response that says "don't use wifi", like come on.. I'm a full grown adult paying for decent internet... I haven't used a fucking wifi since High School...

Anyway, how do i fix this? Seems to be some kind of "routing issue" from ISP to Riot servers. Internet does not drop, but i get DC'd from League. Again, does not happen in any other game at the same time. I usually will play one of them till about 1 am, but sometimes i just want to play League and have to deal with the fucking DC.

Also, no, my router/ISP does not have a "reset" time every night, i have no settings turned on that would make them do that. Iv'e checked. Multiple times. And again, this only happens to League, not to any other games.

Please help... Tired of this fuckin shit.