Words cannot express how angry I am, having graded for the first time using Canvas Teacher on my iPad.  On the computer version, adding comments to a pin is straightforward.  You write the comment, type return, it's saved, you move on.

Grading on my iPad, I wrote my comment and clicked on the big "Done" at the top of the commenting pane — and then moved on.  Comment after comment, on assignment after assignment.

Every commnt is gone.  Apparently, for no obvious reason, you need to first click on the non-standard up-arrow-in-a-circle icon to the right of the typing field first, and only then click Done, or else your text silently disappears without a trace.  No error message, no notification, no warning, just gone.

Why?  Why the unnecessary two steps to save your comment?  But given that both steps are necessary, why is there no warning message when you click "Done" with text in the texrt field, without having first clicked the up-arrow?

Speechless.