Solution for No annotations found on Kindle app on ipad Air 2 and iPad Pro

There was a problem when annotations and highlights made on Kindle app on one device did not sync properly to different devices.

In my case, I used Kindle app on PC to read a book I needed for exam and I made lot of annotations. When opened Kindle app on iPad, these annotations were missing from the book. Note: at the same time, everything was fine with Kindle app on iPhone and another PC (all my markings/highlights were there), but annotations did not sync with iPad (two different models of iPad, both had the same problem).

I searched web for solution, tried to remove Kindle App from both iPads and reinstall it, deregister App but none of these actions fixed the problem.

What helped in my case - I opened the book I was using on Kindle on iPad (annotations were missing), and I made a single highlight to this book (does not matter where, I highlighted 'Copyright'). After couple seconds this highlight was synced across all devices (Kindle on PCs, iPhone and second iPad) BUT most importantly, all annotations and highlights that were previously made on Kindle on PC were now also available on Kindle on both iPads, so book was properly synchronized across all devices with all annotations (as it should be).

This is more band-aid than solution, but it worked in my case.