Wasn't placed into game after hitting 100%

I just had an issue where my game was loading slowly and when it hit 100% there was a short spike of frame problems, as there usually are seconds before the game starts for me. However, it continued to sit on the loading screen. The ping display and the circle continued to spin, the champion info cards could be flipped, and everything seemed fine except I was at 100% and still on the loading screen. I quit out/restarted and, after no more than a minute of resetting and loading, I was placed into a game that was over 3 minutes in.

This has append before, but I was playing with friends and they could give warning if the loading screen was holding me hostage. If something could be fixed or some information regarding how to prevent this problem could be extended to me, that would be nice.

Thank you for your time.