is firmware 112k4 not solving this issue for the mx3 box?
http://freaktab.com/forum/tv-player-support/amlogic-based-tv-players/s802/beelink/firmware-roms-tools/14664-stock-firmware-beelink-s82-m8-mxiii-1-2g-official-fw-releases-from-beelink-user-feedback-thread