Symptom:
The settings for "Enable Flow Reporting and Visualization" and "Report to EXTERNAL Flow Collector" are lost from the flow control preferences..
Cause:
Occurs when renewing the DPI license on SonicOS 5.8.0.x after it has expired. The flow control preferences should be saved, but are lost after the license is renewed.
Resolution / Workaround:
Upgrading to SonicOS Enhanced 5.8.0.2 or higher release, resolves the issue.
Tracking ID: 98281
 Source: SonicOS Enhanced 5.8.0.2 Release Notes