Choosing none as the link path results in bad breadcrumb scheme?

Hello. I enabled the Path Breadcrumbs module, and managed to learn how to apply it. It works okay...

I want my breadcrumbs to end with the title of the node, which is not linked (this is what I read to be recommended). So I choose the last link_path to be "". The title is "!page_title".

This looks okay from the user point of view... but it results in an error in the Rich Snipper data - for both Microdata and RFDa.

Here's how my code ends up like:

You can confirm the error here:

https://search.google.com/structured-data/testing-tool#url=http%3A%2F%2F...

Am I doing something wrong? IT seems like a bug in the Path Breadcrumbs module...

Thanks!

Ron