When creating an issue I want to set the default value for a custom field to be the same as that on the Epic from which the issue is being created. I still want the user to be able to change the selection in the creation screen, so do not want to override the selection via automation at the point the issue is created.
The field in question is called "Work Type" (customfield_10435).
I have Jira Software (Cloud) and ScriptRunner. I think I should be able to do it via a Behaviour in ScriptRunner, but all of the support articles I come across are for Jira Server/Data Centre and the behaviours work differently.
I would welcome suggestions.