Invoke-PnPBatch results in Invalid file name.

[bhishma]

I'm trying to add list items in a simple site.. but keep getting Invalid file name error:

$batch = New-PnPBatch
Add-PnPListItem -List $list -Values @{"Title" ="site1"} -Batch $batch
Add-PnPListItem -List $list -Values @{"Title" ="site2"} -Batch $batch
Add-PnPListItem -List $list -Values @{"Title" ="site3"} -Batch $batch   
$details= Invoke-PnPBatch -Batch $batch -Details

results in

Invalid file name.
The file name you specified could not be used. It may be the name of an existing file or directory, or you may not have permission to access the file.

I'm using
Manifest 1.2.0 PnP.PowerShell
Tested with nightly build as well:
Manifest 1.2.7 PnP.PowerShell

Note: it works if I remove the batching.

[erwinvanhunen]

I moved this to an issue: https://github.com/pnp/powershell/issues/197