The `__exit__(None, None, None)` call always passes None for exception info regardless of whether an exception occurred during the GraphQL operation. The Span's `__exit__` method checks `if value is not None and should_be_treated_as_error(ty, value)` to set `SPANSTATUS.INTERNAL_ERROR`, but since value is always None, exceptions during GraphQL operations will not mark the span as errored. This causes incorrect telemetry where failed operations appear successful.