setFormValue() doesnt work on cascade select in JSD

import com.atlassian.jira.component.ComponentAccessor

def fieldName = "CascadeList"

def field = getFieldByName(fieldName)
def optionsManager = ComponentAccessor.getOptionsManager()

def customField = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName(fieldName)
def fieldConfig = customField.getRelevantConfig(getIssueContext())

def options = optionsManager.getOptions(fieldConfig)
def parentOption = options.find {it.value == "parent"}
def childOption = parentOption?.childOptions?.find {it.value == "child"}

field.setFormValue([parentOption.optionId, childOption.optionId])