There are 2 blue lines in the pic.
Blue line/arrow always point in the direction of your ship and has length proportion to ship speed, so warping will make the the line extend all the way to the edge of your screen.
White line connect your ship with object you select.
In my picture, the upper blue line start from my ship, which is in the middle of the tactical view, go all the way to the right side. The line that connect my ship and the station is white. I believe these 2 lines work as intended and I have no question.
The lower blue line start from station going all the way to the right. This is the one I think is a bug. Why a stationary object has a speed line pointing in the same direction my ship is going?
The 2 blue lines are parallel.