Poweshell OpenFIleDialog works in ISE but hangs when started from command line

This code works in Powershell ISE but when started from command line and OpenFileDialog is called it hangs

$OpenFileDialog = New-Object System.Windows.Forms.OpenFileDialog
$OpenFileDialog.Title = "Please Select File"
$OpenFileDialog.InitialDirectory = $initialDirectory
$OpenFileDialog.filter = "TXT files (*.txt)| *.txt"
$OpenFileDialog.ShowDialog()

When we set .ShowHelp = $true it works

$OpenFileDialog = New-Object System.Windows.Forms.OpenFileDialog
$OpenFileDialog.Title = "Please Select File"
$OpenFileDialog.InitialDirectory = $initialDirectory
$OpenFileDialog.filter = "TXT files (*.txt)| *.txt"
$OpenFileDialog.ShowHelp = $true
$OpenFileDialog.ShowDialog()

and I don't know why but it works!