After processing my wife's photos in Lightroom Classic on my Macbook Air (OS Big Sur 11.2.1) and saving them onto a folder on my hard drive, I access that folder from the Lightroom Classic Library module and create a collection to sync to Lightroom so she can view them on her iPad.
Works fine most of the time. However, several times, my Macbook Air shows sync complete of, for example, 41 photos, but the iPad only shows 22 photos that have synced, but sync is complete.
What could be causing this incomplete sync, where both devices "think" it is complete? How to fix it?