Path substitution not working

Hi,
I am using the Windows Store version.
I have multiple kodi installations with a shared database all on Linux. The library path is usually /mnt/movies.

Wanting to add a Windows box, I wanted to configure path substitutions.
However the relevant section in my advancedsettings.xml seems to be ignored I never even get the DEBUG message I’ve seen in other peoples logs: DEBUG: Configuring path substitutions

To be clear the file is read I see it in the log, and the contained database settings are applied, bit the path substitution apparently does not work and is missing the DEBUG log entry (which is extremely strange since according to the source code that is the first thing that happens after encountering this xml tag)