GitHub user pykenny edited a comment on the discussion: Dynamic mapped tasks 
group arguments are interpreted as MappedArgument when provided to classic 
operators

Earlier I shared my 
[thoughts](https://github.com/apache/airflow/discussions/40728#discussioncomment-12100714)
 on the reply thread, and I think this kind of confusion on writing decorated 
task group often happens because unlike tasks, task groups are just a set of 
layered prefixes attached to task ID mainly used for filtering task subset out 
from a DAG, and that's only why XComs/TaskFlow only work on task level. Making 
the proposed case work implies redesign on DAG model is needed to make XCom 
communication possible at group level.

GitHub link: 
https://github.com/apache/airflow/discussions/40728#discussioncomment-12101338

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