Outcomes Aligned to Tool Objects no longer including all outcomes?

I had been using the Outcomes Aligned to Tool Objects dataset in my SQL query to re-create the Mastery View since there is no easy way to export that table from within D2L. However, this dataset now seems to be missing many outcomes. Has anyone else noticed that this has changed? Some outcomes are no longer logged under an OwnerId/RegistryId even if they were created within the course.
For example, if I filter down to one OutcomeId in Outcomes in Registries, it returns 9 unique OwnerIds/RegistryIds. All of those courses include this outcome added directly to an assignment or a rubric and therefore the outcome always appear in Mastery View. But if I filter down to that same OutcomeId in Outcomes Aligned to Tool Objects, then it returns only 2 rows. Why would the other 7 RegistryIds be missing from this dataset if the alignment does exist?