Unable to automatically show Forced subtitles

Hi.
I’m running Kodi v17 “Krypton” Beta 5 on Raspberry Pi 2 and on Odroid C-2 via LibreELEC (Krypton) v7.90.008 ALPHA.

I’m having problems to automatically and always show forced subtitles internal to .mkv files.
Now the Kodi behavior is to show me Forced subtitles only if I enable the subtitles for that .mkv file during the playback, because by default “Show subtitles” is disabled.

As we know the Forced subtitle “track” (ID) can be present in various combinations inside the .mkv file: it can be the first “ID” or it can be also, for example, the third “ID” in the subtitles list, it can be marked as “Default” or it cannot be marked as “Default”, it can be of a specific language or not (undefined).

May be it’s a my fault to correct configure Kodi for automatically and always showing forced subtitles internal to .mkv files.

So, to start, to understand if it’s a my fault or a Kodi issue, how should I configure Kodi to automatically and always show forced subtitles (if present into the .mkv file) for all mkv files into my Library (or outside my Library)?

Thanks.