Okay, just figure it out!
The key to MERGE different operations bundles is:
So the key factor is WHICH source module is selected for the Agg.
If you want only ONE operation as output, you must select the source module that only has ONE operation as output.
This thread was of help: Combine Operation Values into single string - #13 by Logan_R
I selected as the source module the first JSON, which is 1 operation, and now OpenAI module process ALL BUNDLES BEFORE moving forward to the text aggregator, so when the text aggregator is triggered, it merges all the bundles OpenAI into ONE.
