[Milhouse]

Even setting it in.kodi/userdata/guisettings.xm to true

Code:

<esallinterfaces default="true">false</esallinterfaces>

It reverts to false after restart.

You shouldn't edit guisettings.xml. If the setting isn't "sticking" then try with a "clean" system - rename .kodi to .kodi.bak and try enabling the option. I can't think of a reason right now why this option would keep reverting back to disabled - it's staying enabled on my system so may be specific to your setup (addon, perhaps, or corrupted guisettings.xml).

Note that guisettings.xml is overwritten on Kodi shutdown, so you should only edit guisettings.xml when Kodi is not running ("systemctl stop kodi").