Jira Calendar Dashboard Gadget isn't respecting selected value

Problem

Customer is seeing issues with the Jira Calendar Plugin after updating it to 6.0.1. When selecting any value (except for Target End and Target Start) for the Date to Display attribute in the Jira Calendar Gadget, the returning result assumes that Created is the value selected, which is not correct.

Environment

Jira Data Center 9.3.1
Jira Software Server 9.3.1

Steps to Reproduce

1. Install Jira Software Server 9.3.1.
2. Install Jira Calendar Plugin 6.0.1
3. Create a new Dashboard
4. Add the Jira Calendar Gadget
5. Set the "Date to Display" value to the following:
   1. Created
   2. Due Date
   3. Last Viewed
   4. Resolved
   5. Updated
6. Calendar should show "Created" as the value which is not expected.

Expected Results

We expect that the "Date to Display" set value should be the result returned.

Actual Results

We see that the value selected for "Date to Display" always set as "Created"

Workaround

Downgrade to Jira Calendar Plugin 6.0.0 by downloading/uploading the JAR file from the Marketplace version history.

1. While logged in as a Jira administrator, navigate to ⚙️ (gear icon) > Manage apps > Manage apps.
2. Select JIRA Calendar Plugin and then uninstall.
3. Open the upload app modal and enter https://marketplace.atlassian.com/download/apps/293/version/400000320 in the from this URL field.
4. Click upload.

Notes