1.Go to https://mimir.corp.redhat.com/search/?q=*&p=1&rows=10&documentKind=article 

2.Try to search for any string within Article by adding string under global search bar

Actual Result -

When user added any string in global search, Article facet get clear out and suer end up by seeing all result

Expected Result - 

As user selected Article type then he would expecting to search within Article Only

Note: Same happens on Prod