My Q10 pro has firmware 2.0.4, navigation/sound control bar removed. Kodi upgraded to version 17.3.
I notice an abnormal behaviour when I play mkv files that contain embedded DVD subtitles.
The subtitle does not dissapear. It is only replaced by the next one. So, aslong as there is no new text, the line stays on the screen, where it would normally dissapear after some time.
This is not the case with blu-ray embedded subtitles or embedded srt subtitles. Both function normal as far as the time a line is displayed.