I'm using AEM ContextHub within DTM for the first time, and facing the following issue:
Is there a way to prevent these errors and to, somehow, indicate in the AEM ContextHub tool that dataLayer loads dynamically?
use defensive coding in your data elements when referencing data layer object properties, to see if the data object properties exist before you try to reference them.
Also, dispatch a browser event when the object is added to the array and pass the data in an object with the event. Listen for this new event with DTM