The project list (grid) returns different results versus project tiles in the Modern User Experience (MUX/UX)
Why is there a difference in the logic used for these two pages?
Release : All
Component : Clarity Project Management
This is working as designed. To submit an enhancement for review, see: Enhancement Requests for Clarity.
One option would be to use Manager in the Group By on the project grid, then you will see the inactive managers listed in the groupings.
See also: Projects known issues for Clarity