OneNote for iPad - bug on undo in draw mode.

A useful next test is to determine whether the crash is tied to Apple Pencil input, one page, or the Undo command itself. After confirming the notebook is fully synchronized, create a blank page and make three short strokes: one with the Pencil, one with a finger, and one with the highlighter. Undo each separately and note which action closes OneNote.

Then duplicate the affected page and test Undo on the copy. If the copy crashes but a new page does not, preserve the original and move new notes to a clean page instead of reinstalling the app immediately. If every page crashes, update OneNote from the App Store, restart the iPad, and use OneNote on the web or another synchronized device until a fixed build is available.

Send feedback from OneNote immediately after reproducing it and include the page type, input tool, app build, iPad model, iPadOS build, and approximate crash time. The important detail is the loss of recently synchronized ink, not only the application closure.