webadministration does not refresh the workerprocesses info after recycle (appcmd works fine)

Hello

I am trying to get the processid for a given worker process within webadministration, but it seems that after recycle the info is not updating with new id,handles, start time, etc, it keeps only the id from old worker process:

PS C:\> Import-Module WebAdministration
PS C:\> cd iis:

PS IIS:\> ls IIS:\AppPools\test\WorkerProcesses

Process State Handles Start Time
Id
-------- ----- ------- ----------
2072 Running 146 8/14/2015 10:58:48 AM


PS IIS:\> Restart-WebAppPool test

PS IIS:\> ls IIS:\AppPools\test\WorkerProcesses

Process State Handles Start Time
Id
-------- ----- ------- ----------
2072 Running

PS C:\Windows\system32\inetsrv> ./appcmd list wp
WP "2168" (applicationPool:test)

I have tested on both IIS 7.5 and IIS 8.5 and the behavior is the same.

looks like this is a bug, is anyone able to replicate it ?

thank you