Canvas Annotation Assignment - Re-Submission Issue

[ITRTsmith]

I have teachers using the Canvas Assignment Student Annotations. The issue we are running into is, if a teacher reassigns the assignment for students to edit/revise, students only have the ability to edit answers already there; they do not have the option of adding any additional annotations. So for example, if a student submits the assignment unfinished, they are not able to keep working on the same document. If a student chooses to complete a "New Attempt," then none of the previous annotations are visible. Is there something we are missing? Or a setting that we can adjust? Thanks in advance for your help!