That's right because Kodi doesn't have support for HiSilicon SoC. In fact, Kodi really only has solid support for HD audio passthru for Android via
SPMC, developer @Koying's Kodi fork. Try it, but you won't likely get passthru w/it either as HiSilicon support hasn't been added.
Use wrapper with Kodi, so Kodi uses the HiSilicon player for playback instead, w/full HD audio.