Auto locking camera

Hopped on today to play a quick match and for some reason after my first back my camera auto locked and would not turn off. Hitting "Y" didn't work, clicking on the button above the mini map didn't work. The option was off when I checked it, the only thing that sort of worked was to select the Semi-locked option but even then that was annoying enough. Thankfully the match ended rather quickly but it was an inconvenience none-the-less.