I'm not sure if I'm the only person who's having this issue, sent in a ticket to Riot Games Support 10 hours ago but have not yet gotten a response so here we go..
So the problem (see screenshot too) is that all of my friends appear as offline and don't show their summoner icon. When they do appear online which happens randomly, it either says they're ingame when they're not OR it says "creating normal game" but it shows it in the blue letter suggesting they're already ingame.
I did full repair of the client, full uninstall and reinstall of the game, I reset my router, tried other accounts. Everything is the same.
Which really s***s because I can't sent or accept invites and with the new season having started I like to play with one of my friends.