[CRASH] Disconnecting After Champion Select

[sg-ahri-1] Anyone else struggling with the issue in which you disconnect from the League window after champion select only to be greeted by the "Reconnect" button? I've had this issue for months ever since I bought a new computer (Current one, transitioning from Windows 7 to Windows 10). If I attempt to reconnect before everyone else has loaded in - instant crash and I must reopen the client.

1. (Any matchmade game) Connect.
2. Go through champion select.
3. As soon as people's % begin loading in the error pops up
4. If you attempt to reconnect too early, the game opens as a frozen black screen This happens consistently every single game, even practice tool. Tickets have been sent to Riot Support but unfortunately this seems to have been a long standing and unresolved issue for not just me by the likes of it. I've done it all: Firewall disables, Ping plotting, Reinstalling and Repatching, and i'm losing hope - everything the support has asked. Conclusion? "Must be your router" Feel free to post any solutions are similar issues you are facing; Any help would be appreciated!