Up to how many level of sub-integrations can a fault be thrown?

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Currently, I have a main integration, that calls another sub-integration (1st level), where this sub-integration (1st level), calls another sub-integration (2nd level), and lastly, calls another sub-integration (3rd level).

I expect to throw the error from 3rd level sub-integration on the main integration, but the error only shows this.

On the attached image, I was expecting to show the error message from 3rd level sub-integration, but it doesn't seem to show.

Upon double checking the activity streams of the 2nd, and 3rd level sub-integrations, it clearly shows the expected error message.