Lagg spike and random disconnect from ranked

Hi,
I got disconnected from ranked game after the initial loading screen along with everyone else in the game. (I conctacted them) We all lost -40 SR on the joined role, and -10 on other roles (???), and a 15 min suspend. I tried to use “Rejoin match” button, but it said server error. Also experienced lagg spikes that day (also my partners)
Please can you investigate this? It’s so not cool to loose SR because of server errors…