project = BEACON AND issuetype = Story AND fixVersion in releasedVersions() is correct and will return the stories delivered in the released version 2.0 when run today.

The function releasedVersions() returns all versions for the project that are marked as released and using it with fixVersion in releasedVersions() ensures issues assigned to released versions such as 2.0 are returned. Since 2.0 was released last Friday it will be included in that set and the query will find the delivered stories.

project = BEACON AND issuetype = Story AND fixVersion in 2.0 is incorrect because the JQL syntax is invalid. The in operator expects a list and literal version names need quoting and parentheses. A correct explicit form would be fixVersion = "2.0" or fixVersion in ("2.0").

project = BEACON AND issuetype = Story AND fixVersion IS NOT EMPTY is incorrect because it returns any issue that has any fixVersion set. That will include stories assigned to other released or unreleased versions and it will not restrict results to version 2.0.

project = BEACON AND issuetype = Story AND fixVersion = latestReleased() is incorrect because latestReleased() returns only the single most recent released version. That may match 2.0 today but it is brittle and it will not reliably target 2.0 if additional releases are added. Using releasedVersions() is the safer choice for capturing issues in versions that have been released including 2.0.

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