Notifications show that there are not any Flagged Comments, but filtering for Flagged Comments returns results.
Studio - Publish > Planner
Flagged Comments should be cleared from Studio in a timely manner after action is taken on them. Intermittently, there is a discrepancy between the Action Required notifications and items in the Flagged Comments filter.
This issue is still under investigation. In the meantime, use the Flagged Comments filter in Planner to carefully review the actions required.
Please check the current status of this issue on the Known Issues Tracker.(Issue ID: PUB-867; reoccurrence of PUB-567).