My students shared an issue with me, and I don't know who to tell. Our campus person told me to come here. I looked in the forums, and didn't see anything on this issue. And, I don't have time to look any more. 

I am using the annotation feature for students to submit work. However, the annotation feature on phones and iPad is tricky—it looks like there are no directions, and to get to the annotation “Tab”, they have to hit “submit”. Which is not intuitive. 

So, students think the assignment is blank or I messed up, when I didn't.