Sure. Given this text:
I hit CMD-/ on line 5 and I end up with this:
Instead of what I expected, which would be this:
(I would really have expected a new comment, after "Comment here:" but commenting the whole line isn't too bad. Any time I hit CMD-/ in a file with a comment at the top and bottom, it breaks both comments. Curiously, adding a line-break after line 9 fixes this behaviour but is not ideal.