RDM Invoke Document to parent Session

Hello RDM Team

I tried to invoke a "Document" to a "Host"-element in RDM.

Code:
$system = Get-RDMSession | Where-Object { $_.ID -match $systemID)
sub = Get-RDMSession | Where-Object { $_.ID -match $subID }
Invoke-RDMParentSession -ParentSession $system -Session $sub -Refresh

It works for "RDP", "Explorer", "Webbrowser" and other connection types of the subconnection. Just "Document" doesnt work at all.
As a workaround we use "Command Line" Element and open the document via cmd.

RDM Version: 2022.3.30.0
PowerShell Version: 2022.3.1.2

Best regards
Rolf