macOS Monterey v12.0.1
Katalon Studio v8.2.0
- I created a new Katalon project
- opened it
- In the Test Explorer, I clicked the “Test Cases” node
- then a large black square come up
- I closed the project, and re-opened it. then it looked normal.
- not necessarily reproducible; rarely occurs but sometimes does
Possibly a problem in the Eclipse platform of certain version?