Coupon restriction doesn't work anymore since last updates

our coupons are restricted to the Product category “Promo” and it worked well for many months. After the last updates we recognized that your layout has changed and also the restriction doesn’t work anymore. Now our customers can use a code e. g. “Chris” (which is restricted to “Promo”, even that products don’t have the category “Promo”.
http://www.Salsa-Trips.com/shop/fsf-fpp

We have asked this question also to woothemes, but received no reaction yet. Thanks for any input!

Mar 26 14:10
http://woothemes.zendesk.com/requests/162843

https://ww.wp.xz.cn/plugins/woocommerce/