Can't walk out of fountain (ashe)

Was playing a normal game with some friends. When loading into the game it was slow and I joined the game at about 30 seconds into the match. I bought my starting items Doran's blade, health potion and warding trinket. I then proceeded to walk to my lane however found that i was stuck inside the fountain as though the fountain walls were still present. Reloading the game solved this problem.