Need little help with a weird line renderer problem.

When I rotate my line renderer head the line renderer flips its alignment of that part, it's alignment is transformZ. Like this in 2d view: (black line is not line renderer)

The Head of the line renderer is a bike, when i take a turn, the line renderer gets flipped at that point like shown in dark circle.

In 3d view it looks like this:

This is the problem as shown in dark circle. I want a straight line. This problem occurs when taking a turn with the bike i.e line renderer head. As the bike turn, the line renderer rotates at that point. Anybody got any idea how to fix this?