Facebook pixel reporting duplicate purchases

We use an agency pixel with CAPI. When we test events in Events Manager, everything works correctly, but purchases are still firing twice on Facebook. We’re not sure why.

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We have been informed recently about this issue, we are not 100% sure yet what happened or if it was a change from Facebook itself.

Will be updating this thread with our findings in the next few hours

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Following up on this, there appears to have been a temporary issue preventing some events from being deduplicated properly. This issue has now been resolved. Please let us know if you continue to experience any problems or have any questions.