I tried to upload a set of files through Commons upload wizard
They were part of a set and had common information. Typically, after the first file in a list, there is a tool to copy all the information from the first item in a set to everything else.
Upon pressing "upload", the uploader checks for all sorts of errors, then halts the finalization if something needs to be corrected first. In my case I linked to a blacklisted website. That's fine - I can remove the link - but the problem was that this particular error also caused the "copy everything" tool to inappropriately disappear. I would have liked to retain it, so that I could correct the link in the first image and copy those changes to the entire set.
The problem is that without that tool I had to manually change each description.