PowerShell module terminating unexpectedly - powershell

Question

A PowerShell module I'm working on is behaving very strangely...
I have the following code in a RestoreTestFiles.psm1 file (located in %USERPROFILE%\My Documents\WindowsPowerShell\Modules\RestoreTestFiles\):
Function Restore-TestFiles([string]$backupDir, [string]$destinationDir, [bool]$overwrite)
{
if (!(Test-Path $backupDir))
{
Write-Host "Error, $backupDir does not exist."
return
}
if ($backupDir.EndsWith("\*"))
{
Write-Host "$backupDir ends with \*!"
}
else
{
Write-Host "$backupDir does not end with \*."
}
if ($overwrite)
{
Copy-Item -Path $backupDir -Destination $destinationDir -Recurse -Force
}
else
{
Copy-Item -Path $backupDir -Destination $destinationDir -Recurse
}
Write-Host "Files sucessfully copied from $backupDir to $destinationDir."
}
And I call the function like this:
Import-Module RestoreTestFiles
Restore-TestFiles "C:\some\path\*" "C:\someOther\path\"
For some reason, the output is only either
C:\some\path\* ends with \*!
or
C:\some\path does not end with \*.
But it never runs the Copy-Item or the final Write-Host. If I set a breakpoint, the execution is all messed up:
Stops at breakpoint set on if (!(Test-Path $backupDir))
I step into and it goes to if ($backupDir.EndsWith("\*"))
I step into and it goes to Write-Host "$backupDir ends with \*!"
I step into and it stops running.
Why is the script terminating before it is supposed to?
Edit: I tried moving the function to a regular .ps1 script and called the function from the same script and it works fine...it only terminates prematurely if the function is in a module and called from outside the module. What gives?

Answer 1

I was able to fix this by completely closing all open instances of the PowerShell ISE and re-opening my module.