[Crash] Game froze at loading screen, disappears from programs.

As i was loading into the game, i noticed that my map loader stopped rotating, when i tried tabbing out of the loading screen, it disappeared. While trying to tab back into it, i noticed that it wasnt in my active programs, and checked my hidden icons, the Riot symbol was there. While in the middle of typing this out, my game back back (obvious remake, rip ranked game) and now im being told that im ineligible to earn in game loot.

Edit: this is on the legacy client

1.Champ select 2.lock in 3.loading screen 4.everyone gets to 100% 5. map loader stopped 6. tabbed out 7. game disappeared