Just seen this on google.com. Not sure if this is a feature/test or an error.
Inside a snippet is crumb trail style link actually in the description section as opposed to them being above or below and multiple. And definitely different from site links.
Here it is.
If you then look at the page itself, at the bottom the only reference to this piece is footer style navigation.
I am sure they are MVTing – we do it all the time and see what sticks. I am also on the new SERPs design too. Not sure if I like change !