I Wonder whether the issue with opening a book to a blank page is the issue.
Thus the reply from May 2, 2022 that "Our technical team is aware of this issue and is still working on a resolution." might be related to Amazon's rolls back to firmware 5.14.2
https://www.amazonforum.com/s/questi...ok-not-opening
https://www.amazonforum.com/s/questi...white-10th-gen
https://www.amazonforum.com/s/questi...o-a-blank-page
https://www.amazonforum.com/s/questi...-been-reported
Amazon's acknowledge