Trouble Controlling Powershell Workflow Timeout - powershell

Question

I have a powershell workflow which is generating the error:
"The operation did not complete within the allotted timeout of
00:00:30. The time allotted to this operation may have been a portion
of a longer timeout"
The workflow script is:
Workflow Test-Me (){
Param
(
$Path = "c:\temp"
)
$Files = InlineScript{
Get-ChildItem -Path $using:Path -File -Recurse -Force | Where-Object {$_.LastWriteTime -lt ((get-date).AddDays(-$using:Days))} | Select FullName
}
Foreach -parallel ($File in $Files){
sequence{
InlineScript{
Remove-Item -Path $using:File.FullName -force -ErrorAction:SilentlyContinue
} -PSActionRunningTimeoutSec 300
}
}
}
The line that generates the error is the InlineScript which handles the remove-item operation. It runs and works for 30 seconds after it reaches the operation before it quits with the error referenced above. I've added the -PSActionRunningTimeoutSec parameter to the InlineScript and that didn't impact the error. I've also set the workflow common parameters as follows:
-PSRunningTimeoutSec = 300
-PSElapsedTimeoutSec = 0
I call the workflow cmdlet with the following process:
PS C:\> . "c:\path\to\Test-Me.ps1"
PS C:\> Test-Me -PSRunningTimeoutSec 300 -PSElapsedTimeoutSec 0
There's obviously a timeout somewhere that I can't find/don't know about but powershell isn't being specific. What timeout did I miss and how do I change it?
References:
about_WorkflowCommonParameters
PowerShell Workflows: Using Parameters
Syntactic Differences Between Script Workflows and Scripts
about_InlineScript