Finding all Jupyter Notebooks in subdirectories

[SQLvariant]

When recursively searching through directories, I receive different results when I use foreach{...} around the Get-Notebook function, than when I pipe directly to that same command. If I leave off the -Recurse both versions of the command below return the same results. However, when I include the -Recurse the first version (the one without foreach{...}) only returns results from the top directory level, none of the results from lower directories are included.

dir -Filter *.ipynb -Recurse | 
Get-Notebook -Path $_.FullName | 
Group KernelName

dir -Filter *.ipynb -Recurse | %{
Get-Notebook -Path $_.FullName} | 
Group KernelName