The Person or Group control does not show the loading icon in Responsive Nintex Forms for SharePoint 2019 and 2016

We are reporting an issue with the Responsive Nintex Forms for SharePoint 2019 and 2016 when you are searching for a user in the People and Group action you will not see the loading icon suggesting that the search is taking place.

Replication Steps:
Step 1. In SharePoint 2019 create a new Customer List and add a People and Group SharePoint Colum.
Step 2. Create a Responsive Nintex Forms and add a new People and Group column, do not connect this one to the SharePoint column. Publish the Nintex Forms.
Step 3. Add an item to the list using the Responsive Nintex Forms, search for a user in the People and Group action.

Actual Result:
When you search for a user, you will see that the loading icon will not appear to give you any indication that the search is taking place but the search result will be displayed when the search is finished.

Expected Result:
When you search for a user, you will see that the loading icon will appear to give you any indication that the search is taking place and the search result will be displayed when the search is finished.