Confirmed it works in a fresh product with just the CTF sample imported.
My main project was using the latest runtime source import. I changed it back to the default import from the asset store and breakpoints are working. So it's only a problem in the runtime source version it seems.
I just imported the runtime source in a new project and it was correctly hit. If you try a fresh project with the runtime source does it work? I'm not sure what would cause it to not work - BehaviorManager.onTaskBreakpoint gets triggered and in the editor Debug.Break is called.