Problems with filter/search on category listing

-- HikaShop version -- : 4.4.3
-- Joomla version -- : latest

Hi there
I use HikaShop Business and have some problems with the filter/search module. The start page of my shop is a category listing. When I use the search on this site – e.g. with the word "Benedict" – there is a message "no products found". When I choose a category first – e.g. "Viola Sola" – and use the same word, the correct article is displayed. What am I doing wrong? I think it's a problem with the force redirect/menue, but l can't figure out the problem…Do I have to set up two different search modules – one for category listing, one for product listing?

Thanks for your help
Alexandra

SOLVED… After trying for hours I just found the solution.