When students resubmit their work there is no indication of this in the gradebook when working with New Quizzes. This has resulted in trainers asking students to resubmit work when they already have. I have advised trainers to work from their email notifications as a work around instead or working directly from the gradebook.
Is this currently being looked into?
I have not seen much discussion of this issue, so you might bring it up here: https://community.canvaslms.com/t5/New-Quizzes-Users/Priority-Gathering-for-the-New-Quizzes-Roadmap/...
There has been some related discussion about the need for quizzes that require grading to be marked as needing grading rather than displaying a zero to teachers and students for those questions. https://community.canvaslms.com/t5/Idea-Conversations/New-Quizzes-Grading-Indication/idi-p/361752