New Adobe Photoshop Elements 2019 Organizer does not display all HEIC Images

I think this is something for Adobe Support. To begin, I run latest macOS Mojave 10.14, so this one below does not apply.

Cannot work with HEIC/HEVC files captured in iOS devices | Elements 2019 https://helpx.adobe.com/photoshop-elements/kb/cannot-work-with-heic-hevc-files-in-photoshop-elements-2019.html?red=a

My problem is, that some heic files are correctly displayed in the Organizer after import, others not.

The miniature image is a broken file symbol and as well when opening it in the Organizer, only a broken file symbol is displayed.

The files where shot on an iPhone X and are of course not damaged, they are all correctly displayed in the Finder, with Preview and with Apple's Photos.

When I edit the files in the Photoshop Elements 2019 Editor, it will be opened with a "Camera Raw 10.4 – iPhone X" window. I certainly could then open it in the editor and save a JPG, but this is certainly something I do not want to do with every single image.

As I said before, some HEIC pictures work, other's don't. Among the pictures not working are panoramic shots, but as well ordinary photos.

A fix would be greatly appreciated, since I bought the upgrade to 2019 specifically because of the HEIC support.

Thanks, Bernd