JSX file view in Diff page is incorrect Format.

When i am creating a Pull request for JSX file it does'nt shows the difference - Diff correctly. Just two line - 1. One with pink denoting whole file is removed 2. Second line green with a + sign denoting its added.

I made change on the file and added 10 LOC. This is happening from day one and would like to know if there is a way the format can be changed in bitbucket to view the change, the same way we see in classes.