This has been documented as CLRT-65828 and working as designed in versions prior to PPM 14.4. Starting in 14.4, this capability has been added.
Here's an excerpt from the PPM 14.4 Release Notes on this change:
New Features and Enhancements
Allocation and Actuals for Inactive Projects
In previous releases, time-scaled resource allocation and actuals did not include inactive projects. In this release, the information is included to resolve the following historic business case:
- You finish a project and mark it inactive and plan to formally close it later.
While it is inactive, you continue planning.
In previous releases, portlets excluded allocations and actuals with time-scaled values derived from your inactive projects.
The Allocation-by-Period columns now support the inclusion of inactive investments on the Detail tab of the following portlets:
- Top Down Planning by Investment
- Weekly Detail
To improve your planning capabilities, you can now view allocations and actuals for resources for both active and inactive investments.
Studio developers can take advantage of this enhancement in the Team Allocations system data provider.