There was an exception in a task and then the following logs:

INFO - prefect.CloudTaskRunner | Task 'accounts.link': Finished task run for task with final state: 'Retrying'
WARNING - prefect.CloudFlowRunner | Flow run is no longer in a running state; the current state is: <Success: "All reference tasks succeeded.">
[WARNING] Flow run is no longer in a running state; the current state is: <Success: "All reference tasks succeeded.">
WARNING - prefect.CloudFlowRunner | Flow run is no longer in a running state; the current state is: <Success: "All reference tasks succeeded.">
...
ERROR - prefect.CloudTaskRunner | Failed to set task state with error: ClientError([{'path': ['set_task_run_states'], 'message': 'State update failed for task run ID c9cc30f8-ed56-4def-a2d3-7a8c6e882785: provided a running state but associated flow run 78b75834-d31f-4660-ac0a-d7f365f4f2eb is not in a running state.', 'extensions': {'code': 'INTERNAL_SERVER_ERROR'}}])
INFO - prefect.CloudTaskRunner | Task 'accounts.link': Finished task run for task with final state: 'ClientFailed'
...

Then the flow was manually restarted and finished, however the pod that ran the flow until the exception before the manual retry never died. And strangely in the schematic view, we can see that the task is still in the retrying orange state

If someone has an idea about what is happening and how to fix it ^^ 🙂