I want to filter on all issues of a group of projects that belong to Epics that are in a particular release.
project in (PROJ1, PROJ2, PROJ3) AND (issue in childIssuesOf (issuetype in (Epic) and fixversion in (2021-PI1)))
@Jeff Guthrie, you cannot provide a function inside of the childIssuesOf function. I see that you are using a server Jira. Do you have Scriptrunner at all? Scriptrunner has some nested function abilities which might be helpful in this case.
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