1. Start translating an article.
2. Add a paragraph.
3. Press Ctrl-S to save.
4. Close the tab.
5. Go to the translation dashboard and open the same article.
6. Type another word in the paragraph and immediately close the tab.

Observed:

• There is no warning about leaving the page without saving.
• If you open the same translation again, the word that you typed doesn't appear.

This happens in Chrome, but Firefox seems to save the draft correctly.