team builder changes your lane when you join a lobby sometimes

it doesn't happen often but its happened to me a couple times, it seems to take whatever lane you pick and change it to the lane below that or vice versa. if you click top lane it changes to middle lane, if you click middle lane it changes to bottom lane, if you click bottom lane it changes to mid lane or jungle, jungle Im not sure what it changes to because I rarely play that position but when I do it hasn't changed on me yet.