IPad, Safari.
When I write a long post that fills the box and then some, the box doesn't enlarge so I can't reread what I've written easily. Yes, I can scroll, but when checking a long and possibly quite complex post, or moving a sentence from one place to another, that isn't v helpful.
Please don't suggest Preview. That's a load of unnecessary clicks, not to mention time - Preview is slow and only useful to check pix or 
things.
Until a couple of days ago, the box just expanded as needed. Is this deliberate?