there's a bug on the site right now where if you click outside of the edit box, the UI all gets covered up so you can't click "discard" or "keep working on this post", you're just locked out of it forever. the link above is someone else reporting the bug, so if you are experiencing it vote it up!
...i'm sorry to the person who i was typing up an ask response to. i'll redo it later.
just piggybacking but the "share" modal kinda makes safari on ios chug hard, at least for me.