Render in Place converts mono to stereo, no matter routing

Render in Place converts mono to stereo, no matter routing
I don’t understand. This is said to be fixed in v8.0.20, but I still only get stereo from RIP in v8.5, no matter what I select for source tracks or output channels.

Build 8.5.2 Build 69 64 Bit Built on Apr 29
Windows 8 64 Bit


https://www.steinberg.net/nc/de/support/knowledgebase_new/show_details/kb_show/cubase-8-versionhistory-and-issues-and-solutions.html

Improvements in Cubase 8.0.20

Render in Place (Cubase Artist / Pro only)

The “Render Settings” window has been cleaned up with all options integrated into one window page (the previous 2nd tab “Format” is obsolete).
It is now possible to render tracks in either mono or stereo: For the render options “Dry (Transfer Channel Settings)” and “Channel Settings” the resulting audio tracks keep the formats of their source tracks. A mono track results in a mono track. For the render options “Complete Signal Path” and “Complete Signal Path + Master FX” the resulting audio file format is determined by the output channel of the source track. A mono track, routed to a stereo bus, results in stereo audio files.