sharepoint online – PnP PowerShell – Get-PnPFile error checking if file exists

I’m trying to check if file already exists in a SPO document library using PnP PowerShell command.

This is part of my PowerShell script:

Try {
    #Get all Files from the source folder
    $SourceFilesColl = $SourceFolder.Files

    #Iterate through each file and copy
    Foreach($SourceFile in $SourceFilesColl)
        #Get the source file
        $FileInfo = (Microsoft.SharePoint.Client.File)::OpenBinaryDirect($SourceFolder.Context, $SourceFile.ServerRelativeUrl)

        #Copy File to the Target location
        $TargetFileURL = $TargetFolder.ServerRelativeUrl+"/"+$SourceFile.Name
        Write-Host "Preparing checking file..."
        $checkFile = Get-PnPFile $TargetFileURL

        if($checkFile) {
            write-host "File already exists." -f Green
            write-host "File not exists." -f Red
            (COPY FILE CODE HERE...)

My code is working fine for first item of the foreach loop, but from the second iteration Get-PnPFile runs really slow (first time it takes 1-2 seconds to run, second time it takes about 5 minutes and it seems freezed) and at the end it return that “File not exists” even if the file exists.

I’ve already checked PnP PowerShell releases and I have installed the latest.

I’ve also checked $TargetFileURL but it has not special chars or something that could break the script. For example this is similar to the content of $TargetFileURL variable:

1st: "/sites/intranet/docs/my document.docx"
2nd: "/sites/intranet/docs/tech document.doc"

The only big difference is the file extension. Both filenames contains white spaces.
I’ve also tried with the -ThrowExceptionIfFileNotFound parameter in Get-PnPFile command (obviously I put it in a try-catch block), but nothing changed.

Any suggestion?