Thank you all who wrote and explained here.
I have found the solution. No blocks happen accessing the sites anymore. The culprit was user agent name in settings.In the Webcat browser default user agent “Default Jolla WebKit” gets blocked, but not the “Jolla Sailfish browser”.
As well in the WebPirate browser user agent “Google Bot” gets blocked but not the default user agent “Mobile”. I was trying to find settings to improve page rendering (some sites are rendered in WebPirate only in left third of the screen), so changed user agent. Did not know user agent is only internal browser name with which browser names itself when accesses webpages.