So far, I have lost 3 ranked games because I didn't get loaded into the game. While everyone else loaded in I was left staring at the loading screen at 100% loaded in until my team chose to remake. This has been an issue for some time now with several threads about it:
and many more.
When is this going to get fixed riot?
Edit: Since the recent update for the loading screen, I haven't encountered the issue since, so thank you riot.