listInstances (and most variations) may miss a few instances when there are shadowed pages in the repository.
Make sure there are no shadowed pages in the repository while the listInstances is running. To do this, perform a reclaimAll immediately before the listInstances, and make sure to **NOT** commit any changes to the repository while the listInstances is running. This is usually not practical for operational systems.
Last updated: 7/17/23