I have just finished some marking but found that now and again the student list would disappear from the right side in Speedgrader if I were to leave entering grades and feedback and then click back in. This isn't specifically when I log out and back in. Hopefully you can see by the two attached images what I am talking about - it has been a bit of a lottery leaving and returning to canvas to enter these marks.
you can see at the right end of this 2nd image that I am at the edge of my browser. No resizing or reloading made the student list come back, it was just through closing and re-opening Speedgrader from the Assessment page I would eventually get the list view again.
I am using a 2020 Apple MacBook Pro and this happens in BOTH Safari 13.0.4 and Firefox 76.0.1
