[GAMEPLAY] Unchangeable Screenlocked Camera

In the middle of a game, seemingly randomly, my screen changed from "free-camera" to "locked." I tried clicking the button in the right bottom corner to undo it, as well as pressing the "Y" hotkey but neither worked.

Only dying reset my screen to its default "free-camera" setting.

This affected my gameplay a ton since camera lock is a terrible way to play - it makes you unable to see all the important stuff going on outside the immediate vicinity of your champ.