I wasnt afk

I was about to start a game and after the champion select it exited out, I was worried that the game started without me and I couldn't force it back in. I kept clicking the tab and I got in but I was in the place where we wait for everyone to load. I thought the game hadn't start and it said everyone was at 0%(this was a bot vs ai.) I waited for a whole maybe 3- 5 mins and everyone was 3 levels above me, I later caught on but I got low priority queue. This is not a lag problem, the tab kicked me out. I can't wait for 5 minutes every round. League....