Using regex with the Bulk Edit module

We are running Omeka S version 4.1.1 and Bulk Edit module version 3.4.30.

I am having trouble using the Bulk Edit module to replace a value of a property using regex.

I have two test records titled Dinah 1 and Dinah 2. In the Given Name field on each of those records I have misspelled Dinah (as Donah and Dynah respectively).

I select these two items from the Items page and choose Edit selected from the Batch actions dropdown.
I then tried to use Bulk Edit to correct the Given Name in both records to Dinah.

Omeka S tells me the items were edited successfully, but there has been no change to the data in the Given Name field in either record.