DW seems not to run in the background when updating from 14.7 to 14.8

As I get a bit tired if clicking through the DW when upgrading my wiki I have set the xwiki.properties:

distribution.job.interactive=false
distribution.job.interactive.wiki=false

which should run the upgrade process in the background as soon as the XWiki service gets restarted.

However after updating from 14.7 to 14.8 it seems the DW is not running in the background; after setting the log level of org.xwiki.extension.distribution to TRACE I can only see messages like:

 DEBUG d.i.DefaultDistributionManager - The user [xwiki:XWiki.MyOwnAdmin] 
started the DW so he can access it

but nothing else seems to happen.

I reverted the changes to the properties and now the DW shows up interactively and seems to work ok that way.

Can anyone else reproduce this?
Maybe I missed to set a new configuration option?

Oh, I see the issue has been solved in XWiki 14.9.1 by:

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