Task unexpectedly goes to up_for_retry with "Server indicated the task shouldn't be running anymore" and "Task killed!" errors

### Apache Airflow version Other Airflow 3 version (please specify below) ### If "Other Airflow 3 version" selected, which one? 3.1.7 ### What happened? I created a DAG with a total of five tasks in offline environment. When running, the first two tasks completed instantly within one or two seconds. However, when reaching the third task, it either shows up_for_retry without any log output, or runs for a short while and then shows up_for_retry. The logs display: 'Server indicated the task shouldn't be running anymore', followed by Task not found, and the final line shows 'Task killed!'. I also found this log in the scheduler logs. <img width="1395" height="132" alt="Image" src="https://github.com/user-attachments/assets/6e659355-7bdb-42c0-a141-f7d197b12958" /> My configuration as below, AIRFLOW_CORE__EXECUTOR: LocalExecutor AIRFLOW_DATABASE__SQL_ALCHEMY_CONN: mysql+mysqldb://airflow:airflow@mysql_airflow/airflow AIRFLOW_CORE__DAGS_ARE_PAUSED_AT_CREATION: 'true' AIRFLOW_CORE__LOAD_EXAMPLES: 'false' AIRFLOW_API__SECRET_KEY: 'a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6' AIRFLOW_API__SIMPLE_AUTH_MANAGER_USERS: 'admin:admin' AIRFLOW_LOGGING__WORKER_LOG_SERVER_HOST: 'airflow-scheduler' AIRFLOW_LOGGING__WORKER_LOG_SERVER_PORT: 8793 AIRFLOW_CORE__EXECUTION_API_SERVER_URL: 'http://airflow-api-server:8080/execution/' AIRFLOW_API__AUTH__JWT_SECRET: 'a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6' RAGFLOW_API_KEY: ragflow:ZNhD1iMmU4DCVjyEXZjE4MmZmNTZmMz AIRFLOW_LOGGING__LOGGING_LEVEL: INFO AIRFLOW_SCHEDULER__TASK_INSTANCE_HEARTBEAT_SEC: 30 AIRFLOW_SCHEDULER__TASK_INSTANCE_HEARTBEAT_TIMEOUT: 3000 AIRFLOW_SCHEDULER__TASK_INSTANCE_HEARTBEAT_DETECTION_INTERVAL: 30 AIRFLOW_SCHEDULER__SCHEDULER_HEARTBEAT_SEC: 20 AIRFLOW_SCHEDULER__ZOMBIE_DETECTION_INTERVAL: 300 ### What you think should happen instead? _No response_ ### How to reproduce we are in offline environment, met this prb. Other environment is normal. ### Operating System rhel 9.7…