http://puu.sh/mj4ll/f86c61cba0.jpg
Not so much of a bug, more of a nuisance. The yellow and black objective indicator on the player UI can sometimes be distracting when an enemy player lines up with the indicator on your UI, resulting in the enemy being unable to be seen.
An easy fix (or what i suppose would be an easy fix) would be to make the indicator become progressively more transparent the closer the crosshair gets to the indicator, and finally becoming fully transparent once fully aiming on it.