The Bugsnag library we use in Rhapsody has been updated to the latest version (we were 4 major versions behind). This included a significant change in how unhandled errors are reported to Bugsnag. You can view examples of Angular code changes and examples of non-Angular code changes.
We also added a @rhapsody/bugsnag package for interacting with the Bugsnag JS client. See the package README for documentation and examples.