Game constantly disconnecting after 3-5 minutes

On day 1 of the Season 4 Update I've had almost no problems with the game, but today I tried to play and it's been a pain since this morning.
I boot the game, go through matchmaking, and after 4 minutes on average the game drops the connection. Among the errors thrown there's:
223012S
85011S
85009S
14:145001S:52004S
I've flush DNS, deleted Javelin, reinstalled Javelin, uninstalled the game, re-installed the game. Nothing.
Anyone else having this issue?