ScriptRunner Behaviour is not working on create Screen

[Ulta Tools Admin]

Hi Team , we have created below behaviour but it is not working in create screen ..once ticket created, from there it is working expected .please check the below.

import com.atlassian.jira.component.ComponentAccessor
import com.onresolve.jira.groovy.user.FieldBehaviours
import groovy.transform.BaseScript

//@BaseScript FieldBehaviours fieldBehaviours
def TypeField = getFieldById("customfield_18811")

String issuetype = getIssueContext().getIssueType().getName()

def optionsManager = ComponentAccessor.getOptionsManager()
def selectListCustomField = ComponentAccessor.getCustomFieldManager().getCustomFieldObject(18811)
def fieldConfig = selectListCustomField.getRelevantConfig(getIssueContext())
def options = optionsManager.getOptions(fieldConfig)
def listMap =[:]

if (issuetype == 'Bug'){

def option1 = options.find {it.value == 'Others'}
def option2 = options.find {it.value == 'DEFS4DEV'}
def option3 = options.find {it.value == 'DEFS4CFG'}
def option4 = options.find {it.value == 'DEFECCDV'}
def option5 = options.find {it.value == 'DEFECCCF'}
def option6 = options.find {it.value == 'DEFS4SEC'}
def option7 = options.find {it.value == 'DEFECCSC'}
def option8 = options.find {it.value == 'DEFFIODV'}

listMap.put(option1.getOptionId(),option1.getValue())
listMap.put(option2.getOptionId(),option2.getValue())
listMap.put(option3.getOptionId(),option3.getValue())
listMap.put(option4.getOptionId(),option4.getValue())
listMap.put(option5.getOptionId(),option5.getValue())
listMap.put(option6.getOptionId(),option6.getValue())
listMap.put(option7.getOptionId(),option7.getValue())
listMap.put(option8.getOptionId(),option8.getValue())
TypeField.setFieldOptions(listMap)

}

if (issuetype == 'Sub-task'){

def option1 = options.find {it.value == 'Others'}
def option2 = options.find {it.value == 'ECCDEV'}
def option3 = options.find {it.value == 'CONFIG'}
def option4 = options.find {it.value == 'S4H_CFG'}
def option5 = options.find {it.value == 'S4H_DEV'}
def option6 = options.find {it.value == 'S4H_FIO'}
def option7 = options.find {it.value == 'S4H_SEC'}
def option8 = options.find {it.value == 'SECURITY'}
listMap.put(option1.getOptionId(),option1.getValue())
listMap.put(option2.getOptionId(),option2.getValue())
listMap.put(option3.getOptionId(),option3.getValue())
listMap.put(option4.getOptionId(),option4.getValue())
listMap.put(option5.getOptionId(),option5.getValue())
listMap.put(option6.getOptionId(),option6.getValue())
listMap.put(option7.getOptionId(),option7.getValue())
listMap.put(option8.getOptionId(),option8.getValue())
TypeField.setFieldOptions(listMap)

}