You will need code to do this. I'd usually recommend a listener that picks up a "close" event and scans the sub-tasks and triggers the necessary transitions if they're in the right state.
I'm 99% certain that the scripting plugin can be used to construct this process. See https://marketplace.atlassian.com/plugins/com.onresolve.jira.groovy.groovyrunner
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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