I have found my page apple.stackexchange.com/questions/ask empty.
I had started to write a question, my draft was at most 3 days old. My draft was way younger than 1 week. So it was supposed to be saved and restored.
I have encountered this bug twice.
It would be nice to fix this bug.
http://apple.stackexchange.com/questions/ask
.http
tohttps
, and all meta URLs are now changed frommeta.sitename.stackexchange.com
intositename.meta.stackexchange.com
.