Apologies for the huge delay on this, and thank you for your reply. Priorities, timings etc have almost made me forget about this.
So for the particular app I have problems with, we have upgraded to the latest agent version. Also, this particular app is not dynamically setting the application id.
The error title has now changed (I believe) to ‘Script error.’, and we do get some stack traces, or pointers to 3rd party scripts that are throwing some errors. However, a large proportion have the following:
Stack trace (1 frame)
No source maps associated with this error.
Error: Script error.
This frame cannot be unminified
This error is likely coming from a third-party site and no stack trace is available.
To learn more about the solution to this problem, read our documentation.
The link goes to https://docs.newrelic.com/docs/browser/new-relic-browser/troubleshooting/third-party-js-errors-missing-stack-traces, which basically talks about CORS. The problem is there is no detail as to what endpoint/code is trying to call what.