Hey @Gustavo_Borges , looks like you are right. I can reproduce the same behaviour (with much simpler workflow for better understanding). Indeed, the 2nd set of items is not getting iterated but rather gets concatenated with the first outcome of the first set of iterations.
I believe this is a limitation of the Loop node. You currently cannot loop the “done” outcome back to the input of the Loop (regardless if it is via other nodes, not directly).
You might need to find some other solution. For example, engage another Loop node for the 2nd set based on $runIndex or the loop part implement as a separate workflow.