Some days ago I was reading math.stackexchange on my Android device via the official app when I found a really good answer to a question. I clicked to favorite the question, but now I find that the favorite list does not exist on the app. How can I recover my favorite list there?
You can search for
infavorites:mine (or, more generally,
infavorites:<UID> to search for questioned favorited by the user with ID
UID) when viewing the Mathematics site in the app.
(Note that this is a known issue with the Android app.)