Unable to break on unhandled exceptions in node.js

What in VS Code determines whether you can break on unhandled exceptions within node.js's internal modules?

I have two different node.js projects and both of them have the "All Exceptions" and "Uncaught Exceptions" debugger options checked. However, with only one of the projects, am I able to actually break on unhandled exceptions within node.js itself, such as in the vm.js's runInThisContext method. I've also compared the launch.json files, and both of their configurations are identical.

Thanks!

via Nicole Haugen