iPad Kindle app on iPad delete problem

I use the Kindle app on my iPad Pro. The problem is that there are some kindle ebooks that I cannot “delete from device.” The option does not come up—only delete permanently which means I lose the book forever. Even on the Amazon site under “Content and Devices’ the “delete from device” option doesn’t show up. These are books that show in my “downloaded” page in the kindle app. Help!

(App is updated. iPad iOS is updated. iPad has been restarted several times.)

—pvannest