Setting unreleased version on a scheduled trigger does not set the value

Issue Summary

When trying to set "Next unreleased version" as a Fix Version/s for newly created issues , a4j ignores the field modification and creates the issue without any fix version

Steps to Reproduce

1. Add unreleased version to a project from project settings - Versions
2. create an automation rule that runs on a schedule
3. Create a new task while setting the fix version to next unreleased version
4. Allow the rule to run

Expected Results

The created ticket have the next unreleased version set as a fix version.

Actual Results

The value is not set and the fix version fied is empty

Workaround

Create a second rule that runs on schedule with a JQL , and edit the fix version field manually