We´ve created a (freestyle) job with one parameter of type "List maven artifact versions".

We use a regex to filter the versions of the available artifacts.

When starting the job manually, all available versions are filtered using the given RegEx showing up a chooce-list with lets say all releases of my Pattern. If I select one I can access the choosen version in as shell step with $COMPONENT_VERSION:

Started by user foo/me  (....)
[EnvInject] - Loading node environment variables.
Building on master in workspace /path/to/build_server/jenkins/jobs/xx_choose-version-freestyle/workspace
...
+ echo 'version selected: 1.2.0-b3633-r10121'
version selected: 1.2.0-b3633-r10121

When the same job is triggered by a cron (*/5 * * * 1-5) the result is different:

The returned value of $COMPONENT_VERSION is empty:

Started by timer
[EnvInject] - Loading node environment variables.
Building on master in workspace /path/to/build_server/jenkins/jobs/xx_choose-version-freestyle/workspace
...
+ echo 'version selected: '
version selected: 

I would expect the plugin will return the same value - regardless of the way the job was started.