I have experienced Katalon Studio hanging and never recovering by simply selecting a script in the tab above. It seems to hang very often when I select that same script.
Katalon Studio 8.5
When this happens, I get a spinning wheel and Katalon never ends up recovering. I need to kill the Katalon application. This is very annoying and a major blocker since it happens very often (33% of the times I select the same script).