Enhance Details photos are not corrected;
If the target photo is very dark, it will not be corrected;
If there is too little content in the image, it will not be corrected;
Only two target photos can be corrected per operation, too many target photos will fail completely;
After correction is completed, the overflowing highlights will be cropped (overexposed);
Dark corners of target photos in HDR-dng format and non-RAW format (non-linear files) are not perfectly corrected (edges do not match the flat field exactly);
There are other issues as well, such as
https://community.adobe.com/t5/lightroom-classic-discussions/flatfield-correction-still-bad-af-if-it...
（Translated with DeepL. May not be accurate.）
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