Would be excellent to have this :)
Apr 6 2022
May 12 2020
The problem with the PDF/a has been solved for a while now, I've no idea when...but they started working correctly around 2019. I still get the thumbnail problem from time to time, kinda randomly and almost never on the first page, so difficult to track...
My process for digitalization is always the same: Photo with a Nikon D5300 (JPG) -> Scan Tailor -> AbbyFineReader, didn't find a reason why one pdf fails and others no.