XWiki.SchedulerJobClass: Job execution context user is not used

When defining a XWiki.SchedulerJobClass, there is a field called "Job execution context user". I filled this with a different user than the user who created the page with the jobclass.

When executing the job, der user who created the page is set as context-user during the run, and not the user set in"job execution context user".

Expected behaviour: the script runs as user who is set in "job execution context user"