Authors with invalid Authority entries are not displayed properly on Item pages

[tdonohue]

Describe the bug

If an Item has multiple authors that have an (invalid?) value in the "authority" field, then they will appear smashed together on the Item page like this:

This is reproducible locally or on https://sandbox.dspace.org.

The screenshot above is where I reproduced this on Sandbox in this item:
https://sandbox.dspace.org/entities/publication/consideration-of-financial-satisfaction-what-consumers-know-feel-and-do-from-a-financial-perspective by following the instructions below.

To Reproduce

Steps to reproduce the behavior:

1. First, find an Item that has multiple authors listed in dc.contributor.author, or create one
2. Select "Administer" on that Item and go to the "Metadata" tab.
3. On that tab, edit the existing dc.contributor.author values and add a fake UUID in the "Authority" column like 94466ca9-b8d2-4c8e-9898-3ae87be9b116
4. Save the results
5. Go back to the Item page and notice that the author names are all smashed together on a single line
6. If you edit the Item again and remove the Authority values, then the display behavior goes back to normal.

This is NOT reproducible on demo.dspace.org because the "Authority" field is not directly editable there. So, this seems to be a new bug in 10.0

Expected behavior

Authors should always appear the same way on the Item page, regardless of whether they have an "Authority" value or not.

[guillermo-escire]

Hi @tdonohue, , could you please assign me this issue to work on? thank you!

[tdonohue]

Sure @guillermo-escire . Thanks for volunteering.

Also, while I have your attention, could you please respond to our questions on #4283 ? We'd like to find a way to get that bug still fixed, and the PR is now outdated. If you cannot continue to work on it, that's OK...but then I'll just close the PR and look for a new volunteer.