Placeholder tip makes issue page cluttered
With the current design of the issues page and issue comment box I don't think that placeholder tip is useful, in fact quite the opposite. It makes the page too cluttered and very frustrating to use.
The comment box feels filled up so you don't have a feeling of where to write your comment
In the current design I strongly feel that the comment box needs to remain empty.
@dzaporozhets suggested something that can be discussed, tip outside the comment box: