Morning team! I have a few questions regarding automation and DeploymentTrigger, so I have a self hosted prefect 3.2.11 and I setup the tigger like this

deployment_trigger = DeploymentEventTrigger(
        expect={"someevent.completed"},
        parameters={"payload_dict": "{{event.payload}}"}
    )

But when I check it on the PrefectUI it looks ok when I click

show params

but once I click

edit

it shows up empty inside