[Zotero 7 Beta] Expanding the list of creators triggers the creation of a new creator

mjthoraval

Steps to reproduce:

1) Open a PDF file with a large number of authors, so that the list of authors is collapsed:

https://s3.amazonaws.com/zotero.org/images/forums/u265723/wef80vuxusl684oyxo3v.png

2) Click on "3 more..."
-> A new Author is added:

https://s3.amazonaws.com/zotero.org/images/forums/u265723/osr77bawrvt2wr5wcigh.png

Probably related to this other bug:
https://forums.zotero.org/discussion/115428/zotero-7-beta-display-of-new-author-field-when-opening-a-pdf-file

Debug ID: D2055282465
Zotero 7.0.0-beta.91+3c6625f3c (64-bit)
Windows 10