Some markdowns doesn't work as should in issue creating

When creating/editing issue or leaving comment we see 'description' field. This field markdowns have these bugs: [*New line(enter button)*] does nothing - saved text always is in one line, this makes another bug: 'Bulleted list' doesn't work as should - this just writes every element in one line, and makes some of them 'italic'. Here is an example:

• first line
• second line
• third line