DTS(HD) sound in Kodi 17.*

Hello,

I have bought a new Bqeel X9T Android Smart Box Android 6.0 Box and
after installation of KODI 17.2 I was wondering that there was a DD audio signal but no DTS/DTS-HD sound playing.
Even the receiver does not switch to the modes which means that the signal (hdmi passthrough) is not receiving.

Then, after some tests, I decided to go back to the latest KODI 16 version and there everything was working as expected.
Therefore my question if the problem is maybe with the hardware of the Bqeel X9T Smart Box (not “supported”) or maybe a possible bug in KODI ?

Any help would be great, in case of logs required, I have to check how to get them out of the box.

Thanks for assistance and BR!