I don't use the rich text editor because it's not a real "text area" detected form.
it's a dynamically rewritten text and seen as plain text webpage by the browser.
I use addons to auto-copy selected text from a page but not from a "form", which doesn't work and is really annoying with rich text editor. I guess it's the same problem with autocorrect text detection from phones, it's not seen as a text editor and therefore doesn't suggest correction?
I just use the normal text editor, and it also fix the failed auto-tag format replacement. (yes, tags are often messed up : deleted links, font colors, etc.)