Im MUX the Status Report Current Phase only has the top level task available for choosing.
On the status report Current Phase it is only pulling the top level phase of the WBS when trying to add the correct current phase.
Release : 16.0.1
When the WBS has a top level summary task, normally created to roll up values, the Status Report only has the that phase available to choose.
If there is no top level task and phases are all at level 1, each phase is available to choose for the Status Report current phase.
This is the current design.
A custom attribute could be created to manually input the current phase. This could then be used on the Status Report.