Let me preface by saying that, as the Instructional Designer, I do not have firsthand experience of these issues, but the instructor who reported them to me is technologically savvy enough that I do not believe them to be user error.
First, there have been several students who have not had the save button show up in the rubric while they are completing their peer reviews. This problem is not a browser specific issue, but a refresh of the page eventually resolved it for most students. I'm curious if anyone else has seen this issue directly and if there have been any potential solutions.
Second, some students did not get the green check mark for completing their peer reviews. Even after filling out the rubric and leaving a comment in the comments section it showed the yellow, incomplete warning. Again, just looking for input if anyone has seen this issue directly.