Breadcrumb error

Hi. Issue with Breadcrumb Pro.
On my woocommerce product catalogue, the second level of breadcrumb (e.g. Products > Hydraulic Hose) is always accompanied by an error message undefined variable: breadcrumb_items_new relating to line 1300 of the function-hooks.php file.

Displaying level 1 or levels 3/4/5 etc of breadcrumb are fine, the error only appears on the second level pages. Can you fix this? I don't have this error on the other sites with the same theme that I use Breadcrumb on.