And same behavior if I make the dependance explicty via the retunr of the first one

#!/usr/bin/env python3
import fire
from typing import Optional
import time
from clearml import PipelineController
def step_one(a=1):
    import time
    print("Step 1")
    time.sleep(120)
    return True
def step_two(a=1):
    import time
    print("Step 2")
    time.sleep(120)
    return True
def launch(
    tenant: str = "demo",
    loc_id: str = "common",
    tag: str = "test",
    pipeline_id: Optional[str] = None,
    queue: str = "default",
    skip_done: bool = False,
    abort_on_failure: bool = False,
    project: str = "CustomPipeline",
    start_locally: bool = False,
    task_regex: str = ".*",
    **kwargs,
):
    pipe = PipelineController(
        project="TEST",
        name="Pipeline demo",
        version="1.1",
        add_pipeline_tags=False,
    )
    pipe.set_default_execution_queue("cpu")
    pipe.add_function_step(
        name="step_one",
        function=step_one,
        function_kwargs={},
        function_return=["b"],
        cache_executed_step=False,
    )
    pipe.add_function_step(
        name="step_two",
        parents=["step_one"],
        function=step_two,
        function_kwargs=dict(a="${step_one.b}"),
        cache_executed_step=False,
    )
    pipe.start()
    print("pipeline completed")
if __name__ == "__main__":
    fire.Fire(launch)