PipelineParameter doesn't work in Azure Machine Learning Pipeline with DatabricksStep

Hi,
i created a pipeline with several steps (azureml-defaults==1.23.0). When I run the published pipeline from the studio, the databricks steps always take the default value of the```PipelineParameter``` no matter what value I choose when i submit the pipeline.

```python
parser.add_argument('--import_date', type=str, default = "2021-04-23")
....
....

import_date = PipelineParameter(name="import_date" , default_value = params.import_date)
cluster_id = PipelineParameter(name="cluster_id" , default_value = params.cluster_id)
step_type = PipelineParameter(name="step_type" , default_value = params.step_type)
churn_months = PipelineParameter(name="churnMonths" , default_value = params.churnMonths)

data_import_step = DatabricksStep(name="Databricks Data Import Step",
existing_cluster_id=str(cluster_id.default_value),
notebook_path=import_notebook_path,
notebook_params={'ChurnMonthsWidget': churn_months,
'startDateWidget' : port_start_date,
'ImportDateWidget' : import_date,
'StepTypeWidget' : step_type},
run_name='Job_Data_Import',
compute_target=databricks_compute,
allow_reuse=False)
.....
.....
.....
pipeline_steps = StepSequence(steps=[data_import_step #Step 1
,data_manipulation_step #Step 2
,data_extraction_step #Step 3


,training_data_preparation_step #Step 4
,model_training_step #Step 5


,prediction_data_preparation_step #Step 6
,prediction_step #Step 7
])

pipeline = Pipeline(workspace = ws, steps=pipeline_steps)

published_pipeline = pipeline.publish(name = params.pipeline_name,
description = params.pipeline_description)
```

Here the default value is 2021-04-23 and i set the import_date parameter to ''2021-04-22

but the databricks notebook takes 2021-04-23 as import_date

the databricks notebook has the following widgets

```python

today = str(date.today())
dbutils.widgets.text("ImportDateWidget", today, label = "ImportDate")
import_date = dbutils.widgets.get("ImportDateWidget")

startDate = "2019-01-01"
dbutils.widgets.text("startDateWidget", startDate, label = "startDate")
start_date = dbutils.widgets.get("startDateWidget")

ChurnMonths = 3
dbutils.widgets.text("ChurnMonthsWidget", str(ChurnMonths), label = "ChurnMonths")

step_type = "Training"
dbutils.widgets.text("StepTypeWidget",step_type,label ="StepType" )

N_MONTHS_CHURN = int(dbutils.widgets.get("ChurnMonthsWidget"))
import_date = dbutils.widgets.get("ImportDateWidget")
start_date = dbutils.widgets.get("startDateWidget")
N_MONTHS_CHURN = int(dbutils.widgets.get("ChurnMonthsWidget"))
step_type = dbutils.widgets.get("StepTypeWidget")
```