Images uploaded using file picker do not have Ally gauge

Images uploaded using file picker do not have Ally gauge

ALLY say that this is functioning as designed:

This is known and expected behaviour. It occurs because of the predictive nature of determining whether alt text is meaningful or not.
Note that the underlying issue is due to the file name and alt attribute, and not the drag / drop or file picker. We don't expect any problems with the file picker or drag / drop.