What are Events Manager diagnostics?
Diagnostics is a tab in Meta Events Manager that helps you find and resolve issues with your web, app or offline events, and shows recommendations to improve your event setup. Each issue has a description and fix steps, and is marked critical (red) or a warning (yellow). Issues sit under Active, Previously detected or Ignored.
The Diagnostics tab is Meta’s list of problems it has found in the events you send. Each item says what is wrong and how to fix it, and Meta categorizes the items as critical or a warning and files them under three status tabs. Knowing the three status tabs and the two severity levels tells you which items to act on first, and what happens when you mark one as resolved.
How do you open the Diagnostics tab?
- Go to Events Manager.
- Click the Data sources tab on the left.
- Click your data source. A red icon next to it means there are critical issues to fix.
- Click the Diagnostics tab and review your active issues.
- Click “Learn how to fix this issue” on an issue for more information, then follow the steps.
- Mark the issue as resolved if you wish; this is optional and applies to web and app issues.
What do the three status tabs mean?
| Status | What Meta puts there |
|---|---|
| Active | Issues detected in the last 24 hours that are not marked resolved or ignored |
| Previously detected | Issues you did not interact with within 3 days of first detection; the instructions to resolve them are removed |
| Ignored | Issues you clicked Ignore on; they stay there until you move them back to Active |
Meta suggests monitoring your diagnostics regularly and resolving issues as soon as possible. An issue that slips into Previously detected loses its fix instructions, so act on Active items first.
What is the difference between critical issues and warnings?
| Level | Icon | What Meta says it covers |
|---|---|---|
| Critical | Red | High-priority changes to your event setup, due to platform updates, evolving privacy regulations and Meta’s privacy policy violations; Meta says to complete them as soon as possible |
| Warning | Yellow | Low-priority issues and useful features that can help maximize the value of Meta business tools |
Meta’s examples of warnings are a value parameter that may be set up incorrectly and a Meta Pixel that recently started sending events from new domains. If the second one is a surprise, read how Meta Pixel traffic permissions work.
What happens when you resolve or ignore an issue?
You can resolve or ignore each issue.
- Resolve: Follow the instructions on the issue. If Meta does not detect the issue the following day, it moves the issue to Previously detected automatically. For web and app issues you can also mark it as resolved yourself. If Meta detects it again after 3 days, it moves back to Active.
- Ignore: Click the three dots in the top-right corner of an active issue and select Ignore. It moves to the Ignored tab.
Meta says that ignoring or marking web and app issues as resolved applies for everyone in the business portfolio. Ignoring an offline issue applies only to you, and Meta says mark as resolved isn’t currently available for offline events. Before you ignore something, check whether a colleague relies on it.
Where do diagnostics fit when events look wrong?
Diagnostics lists issues Meta has detected, while the Test events tab checks that events are set up and firing. If an event is not arriving at all, start with why a pixel may not fire and how to use the Test events tool. For the wider map of tabs and menus, see what Events Manager is.
FAQ
Why did an issue move out of Active?
Meta says that if it does not detect the issue the following day, it moves the issue to Previously detected automatically. An issue also moves there if you do not interact with it within 3 days of first detection. If Meta detects a resolved issue again after 3 days, it returns to Active.
Do I have to fix every warning?
Meta describes warnings as low-priority issues that highlight useful features, and critical issues as ones to complete as soon as possible. The page does not say warnings must be fixed. You can fix a warning, or ignore it, and move it back to Active later if you change your mind.
Can my teammates see what I ignored?
For web and app issues, yes in effect: Meta says ignoring or marking an issue as resolved applies for everyone in the business portfolio. For offline issues, ignoring applies only to you and not to others in your business portfolio.
Sources
- About diagnostics in Meta Events Manager (Meta, checked 2 Oct 2026)
- View diagnostics in Meta Events Manager (Meta, checked 2 Oct 2026)
- About Meta Events Manager (Meta, checked 2 Oct 2026)
Drafted with AI and checked claim by claim against the pages linked under Sources. Found a mistake? Tell us via the corrections policy.