Cannot load into premade ranked trios.

Ive had a problem the last few days where i cant connect to ranked trios with a full premade squad, i can when duo quing and solo quing, just not trio. It will show me a black loading screen and kick me to the lobby while my friends get into the game. I can also load into any other mode with a premade squad. I can load into a ranked trios when testing on my phones mobile data but its on 600ping so i cant really play on that. This has never before been a problem with my current router, ive tried troubleshooting it a lot and for example putting my pc outside of my routers firewall and whitelisting ips and stuff.