Debugging doesn't work correctly

Hello everyone!
I ran into the problem of running a test case in debug mode.
The katalon studio stops at the breakepoint, but the code is not executed, the values of the variables are not defined, nothing is displayed in the Debug tab. Katalon is hanging if i click F6 but working correctly if continu program execusion in case I click on the button to finish execusions (green triangle).
One more strange thing - when i add a breakepoint there is long time building workspace.
Unfortunatelly i did not find anything helpful in docs…

Please, give any suggestions how to resolve my issue.

Thank you in advance