Steps to Reproduce
- In the affected instance, hover mouse over a reference icon until popup window appears.
- Hold shift and move the mouse icon to keep the popup window open.
Occasionally, you will see that the popup window does not have the 'X' in the upper right corner to close the window.
Add the attached global UI script to your instance. This adds a close button to the popup on the hover event and the initial display of the popup. The popup will then be closed even if the popup is stuck in the open state.
Related Problem: PRB636708