I almost never use Chrome for G2G, but my iPad. It doesn’t show my mistakes, but if I recognize one and tap on it, I get the choices for the word I misspelled. I see how that can be frustrating for Chrome users.
However, there is one problem with the answer field, and that is that the field is so small, it doesn’t show all of my answer. If I scroll back up to add or correct something, as soon as I start typing, it slides down to the end of the field so that I can’t see what I’m typing.