Continuing the discussion from Help with nutrient details not specified on the official Soylent label:
Topic drafts are indeed saved. However there is only 1 draft since you can only have one new topic “in flight” at any time.
Here’s a screenshot of a new topic I started composing on try.discourse.org in Google Chrome, then I closed the browser and started up a new browser (IE). Once I logged in, the editor popped up on the homepage with my draft topic:
However, you must be on a topic list page, not inside a topic, for the topic draft to appear. You can test this yourself on try.discourse.org as I have. Note that I did this from the homepage which is /latest. Where did you begin composing your new topic from?
(Reply drafts, you can have one for every topic in the system, in theory anyway. And reply drafts pop up when you enter the topic they are replying to.)