woocommerce and relevanssi - product search doesn't find product

In my wordpress I have relevanssi plugin.

When I search for a product in product search widget I get no relevanssi.

If I turn off the relevanssi plugin I get results.

The query string: http//http://ift.tt/1QRJcEg

Any idea how to fix it?

Thank you,

Sam

via Chebli Mohamed