If a form text field is linked to multiple locations in a PDF, PdfFileWriter.updatePageFormFieldValues fails to set the value.

If writer_annot contains a link to a Parent object, the value in that should object should be set.
writer_annot_parent = page['/Annots'][j]['/Parent'].getObject()

https://github.com/mstamy2/PyPDF2/blob/a4279cff969c38a346a29aa0d3174a8b7bf08bbe/PyPDF2/pdf.py#L366