In the DLP Enforce Console, navigating to "Manage -> Policies -> Sender/Recipient Patterns" and attempting to open a recipient pattern led to the error message "Page Unresponsive." The page took a long time to load afterward.
DLP Release: 25.1
Upon reviewing the recipient pattern, we noticed that it contained multiple lines of entries. Ideally, the recipient pattern should consist of a single line, with all email addresses or domains separated by commas.
We removed multiple lines and ensured there is only one single line, with all email addresses or domains separated by commas. Once we fixed that, the page loaded quickly without any issues.