KODI on HiMedia Boxes won't play HD audio, neither SD DD+ Atmos.
HiMedai Player with KODI + Wrapper or directly from Media Center should.
Try to rename .m2ts to .mkv and give it a try. Simple "trick", works for me most of the time.
If still not works, remux the m2ts video completely in to mkv with MKVToolnix (needs a PC).