I have seen there were similar issues in the past but they were related to the persistence of the setting and from an earlier version.
My issue is that after setting a shortcut for Parking, using that shortcut does not do anything. The setting persists between restarts fine - but still does nothing - even after a reboot.
I have tried various different shortcuts, even ones that work for another action (Home for example), but no luck with park. If I use the Park button in the GUI it works fine.
This is version 1.5.7 on Linux Mint from .deb package.
Thanks
Jules.