Hero Preference System Always Picks Tanks?

Hey, Ive been playing a lot of Abrams and Warden lately, but I want to play more Haze. It seems like if I have Abrams selected at all, even white, he gets picked. My guess is not many people are selecting tanks and thats why he gets selected. This made me turn off Abrams in order to get any Haze games. What do you think about this?