Join Date: Jun 2014
Location: Toronto, Ontario, Canada.
Interest: Poutine-lovin', maple syrup junkie.
Did some more investigation of the draft feature, which is only available via the mobile skin of the site so I wasn't too familiar with it myself as I always come via my lap top.
The save is cookies based, and will expire after 7 days like it says, but will also be lost if you clear your history/cookies from your browser. This also means it can only be accessed via the same device and same browser.
When there is a draft saved, you should see a red icon on the start thread button when you are in the same section. When you hit the button, your draft should load automatically.
If this didn't happen this time, then my guess is that either the cookie file was corrupted, or there is a setting in the browser that blocked or cleaned it