А тем временем вышла новая версия прошивки "X20 V1.2"!
Нашел на китайско языковой версии сайта на вкладке скачек (http://www.xduoo.com/xduoo/DownList.Asp).
Чейнджлог всунут в архив с прошивкой:
1. Fixed the problem that splitting some DSD-ISO files is wrong
2. Fixed the problem that some songs are playing will be stutter in first 3 secons
3. Add browse U-disk files through HiBy APP after connect HiBy APP to X20
4. Change the select order of main menu
5. Fixed the problem which some bluetooth car player/bluetooth headphone can't be connected to X20
6. Update the Russian/French language library
7. Optimize system