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Airflow - Xcoms and parallel jobs - problem (xcoms overwriting themselves)

I have the pipeline below. On my 2nd level of tasks (first paralel tasks) I write a Xcom with some ID, then in the 3rd (2nd col. in paralel) and 4th column of tasks (3rd in paralel) I retrieve the xcoms I wrote in column two. The problem is that since it's writing 6 tasks at the same time, the XCOM that sticks in the end is the last one that was written.

Is there a way for me to make these Xcoms work in parallel? by now because of this problem I have to run all of theses tasks linearly, so the xcoms work correctly... Image can be seen here: https://i.stack.imgur.com/aXFWz.png


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