Content Aware Fill - line creation issue

I have noticed in a recent batch of edits I have been doing in Photoshop, the Content Aware Fill seems to be stuggling to create fill with extending lines from original image that are at an angle. 

The Content Aware Fill makes these lines more horizontal, not on the path of the original line. Changes in amount of area selected as sample does not seen to alter the result.

Wondering if anyone else has experienced this, and if there is a solution to producing a better fill result?