Since early in the NS6 product, collections that are not assigned to enabled policies do not update the membership through the normal collection update schedules. This same functionality / behavior exists in SMP7 (NS7) relative to task membership updating. This behavior is the product working as designed and exists to protect the Notification Servers from spending time and CPU cycles updating collection / filter memberships that generally are not being used.
In some cases, and these are showing up a little more in SMP7 (NS7), there are filters that are not assigned to enabled policies that are used by solutions or reports and these are not being updated.
Is there a way around this situation?
Create and schedule a task to update filter membership: