tirkarthi commented on issue #49737:
URL: https://github.com/apache/airflow/issues/49737#issuecomment-2828305769

   Interesting, this works for `[None]` and `[1, None]` to run only one task 
but when `None` value is in the middle this error is present. I guess the 
`map_index` of 0 and 2 have xcom pushed but the underlying task seems 2 
upstream tasks and tries to get `map_index` for 0 and 1 which causes 1 to have 
no XCom. I am checking on this.


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