Hi Tomasz,
Sorry for the inconveniences.
We are able to reproduce the reported issue for unscheduled tasks. We logged a bug report for this, you can track the status from below feedback link.
We will fix this issue and include the fix in our Volume 3, 2019 release which is expected to be rolled out on September 30, 2019.
Until then we appreciate your patience.
Regards,
Gurunathan