Missing books on MacOS X Big Sur using iCloud and the workaround

My Documents folder is on an iCloud drive. I keep experiencing "Missing" banners on my eBooks in ADE 4.5. Selecting the "Show in Finder" option for one of these books, I saw the book was unexpectedly marked as offline in Finder. Workaround: Clicked the cloud icon on the book file to download it, and the "Missing" banner was gone. Clicked the cloud icon for the folder and my other "Missing" book files were downloaded as well. I would like to ssee ADE detect and address this condition without my intervention.