fix: Type mismatch for DateInterval in latest only operator

providers/standard/src/airflow/providers/standard/operators/latest_only.py

@@ -99,9 +99,19 @@ def _get_compare_dates(self, dag_run: DagRun) -> tuple[DateTime, DateTime] | Non
 
         from airflow.timetables.base import DataInterval, TimeRestriction
 
+        if dag_run.data_interval_start:
+            start = pendulum.instance(dag_run.data_interval_start)
+        else:
+            start = dagrun_date
+
+        if dag_run.data_interval_end:
+            end = pendulum.instance(dag_run.data_interval_end)
+        else:
+            end = dagrun_date
+
         current_interval = DataInterval(
-            start=dag_run.data_interval_start or dagrun_date,
-            end=dag_run.data_interval_end or dagrun_date,
+            start=start,
+            end=end,
         )
 
         time_restriction = TimeRestriction(

providers/standard/tests/unit/standard/operators/test_latest_only_operator.py

@@ -312,3 +312,21 @@ def test_zero_length_interval_treated_as_latest(self, run_task):
 
         # The task will raise DownstreamTasksSkipped exception if it is not the latest run
         assert run_task.state == State.SUCCESS
+
+    def test_regular_latest_only_run(self, dag_maker):
+        """Test latest_only running in normal mode."""
+        with dag_maker(
+            "test_dag",
+            start_date=DEFAULT_DATE,
+            schedule="* * * * *",
+            catchup=False,
+        ):
+            latest_task = LatestOnlyOperator(task_id="latest")
+            downstream_task = EmptyOperator(task_id="downstream")
+            latest_task >> downstream_task
+
+        dr = dag_maker.create_dagrun(
+            run_type=DagRunType.SCHEDULED,
+        )
+
+        dag_maker.run_ti("latest", dr)