Previously, when using the /reports/{campaign_id}/open-details/ endpoint within a batch operation, you could get an Unknown Filter error if you had more than 1,000 entries in the collection, or if you submitted query parameters other than since.

The endpoint was not correctly handling parameters, and would throw the Unknown Filter exception in cases when it should not. We removed this exceptional case, and will now ignore unexpected query parameters. Batch requests using this endpoint should now resolve successfully.