Nasty warning message when doing any activity while viewing an issue

View any issue

Perform any other function (e.g. create issue, or type something into Quick Search and press Enter.

Expected Results:
Operation will proceed.

Actual Results:
Message appears:
Are you sure you want to navigate away from this page?
You have entered new data on this page. If you navigate away from this page without first saving
your data, the changes will be lost.
Press OK to continue, or Cancel to stay on the current page.