If I have code that starts with a /* comment marker, it is not shown highlighted as a comment in the preview/map/scroll area to the right of the editor, except for where I have visibly scrolled the editor down and seen the /* marker (see screenshot #1). In that screenshot, the /* */ block goes all the way last line of code in the file. The preview bar matches what I have viewed so far as highlighting the comments in green.
If I press CTRL + END to jump to the end of the editor file, the highlighting in the editor and the preview bar do not know I am looking at comments (screenshot #2).
If I hover my mouse over the preview bar, and without clicking move the mouse up and down over the preview bar, the highlighting in the editor gets totally messed up where some lines are green and some lines are not (screenshot #3), but the preview bar will show the correct green highlighting in the areas I moused over.