Premiere Pro Can't Recognized Adobe's Own Enhanced DNGs

Asking if anyone knows the reason for this:

I want to use the new Enhance feature in Adobe Camera Raw to enlarge Blackmagic DNG files from HD to UHD: Using Camera Raw Enhance on a 1920x1080 file scales it perfectly to 3840x2160, aka 4K.

But Adobe Premiere Pro (version 15.4.1 running on a MacPro Big Sur 11.5.1) can't read Adobe's own Enhanced DNG file format, even though it had no issue with the initial ingest where PrPro made each folder (representing a shot from the camera) a single video file linked to the sequential raw files. 

In Adobe Bridge, I bring the individual files into Adobe Camera Raw, batch Enhance the files, then back in Bridge delete the original dng files, batch rename to remove "_Enhanced" and add a sequential number starting with _001. All that works fine. But then when I try to either relink those files or ingest them as a new video clip, Adobe PrPro says the files are damaged or an unknown format. (Interestingly, After Effects has no problem reading those same files, recognizing them as a single video file. I would use AAE as a work around but AAE has no way to export out to DNGs.)

So, Adobe's own NLE, which can normally read/ingest sequential video dng files, can't recognize Adobe's own Enhanced dng files from the same source. Why?