Search field doesn't store typed keyword and doesn't show corresponding products on Category Page

[irapetrovych]

Environment: Windows Server 2012 R2 Standart, Opera(68.0.3618.104)

Steps to reproduce:

1. Go to https://naturechoice.azurewebsites.net/
2. Chose any Catalog (e.g.'Women')
3. Click on 'All Categories'
4. Type - 'gosha sweaters','Gosha Sweaters', 'Sweaters Gosha', 'sweaters gosha', 'Gosha', 'gosha'in a different sequence on the Search field and press enter

Actual result:
Typed words on search field are stored.
Does not show the products from selected catalog with corresponding keywords

Expected result:
Typed words on search field are stored.
Products from selected catalog with coresponding keywords are shown