Vamsi-klu commented on PR #68789:
URL: https://github.com/apache/airflow/pull/68789#issuecomment-4764148546

   This gives `sdk.XComModel.get_value()` different semantics between Airflow 2 
and 3. On Airflow 2 the compat fallback resolves through `XCom.get_value()` and 
the configured XCom backend, but this Airflow 3 helper always calls 
`XComModel.deserialize_value()`. With object-storage/custom XCom backends, 
extra-link code can receive the stored reference/path instead of the actual 
value. Please either route deserialization through the configured backend for 
this server-side helper, or make the raw-DB semantics explicit and add a 
regression test with `XComObjectStorageBackend`.
   


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