Comment # 1 on bug 953442 from Ancor Gonzalez Sosa

I cannot reproduce that behavior in my current installation of Tumbleweed in
neither the HTTP Server or Hostnames modules.

Can you please verify it still happens to you and attach yast logs and some
screenshot?

More info about YaST logs.
https://en.opensuse.org/openSUSE:Report_a_YaST_bug