Kodi 17 ASS/SSA subtitles not working anymore

In Kodi 16 I was able to use mkv files with integrated special ass/ssa subtitles by installing specific fonts on windows, merging aegisub subtitles in the mkv files and then dropping the fonts in the font folder of Kodi (in program files).

The result was something like that :

Now I use Krypton beta 3 and for these exact same fonts I still have the modified colors of the ssa subtitles but not the specific fonts.

Take a look at this :

Do you know what has changed from Kodi 16 to Kodi 17 and if this issue is on the roadmap for RC ?

Thanks a lot for your answers !