Dolbt Atmos is decoded as Dolby TrueHD – every other audio format is OK

Hi my KODI friends, i need your help

1.
my setup is intel NUC Core™ i3 Processor (NUC5i3RYH) + DENON AVR X4300 speakers 7.1.4
Kodi 17.0 Feb 1 2017 Windows 10 (1607)

2.
Everything is great with 7.1 audio formats: Dolby, Dolby TrueHD, DTS, DTS HD Mstr, are decoded OK
DTS:X Mstr is decoded OK

3.
Dolby Atmos is decoded as Dolby TrueHD. only 7.1 speakers.
Whats could be wrong Confused

ikr,.