Kodi 16.2 Volumen amplification

Hopefully someone can help me with this issue I have shield tv 2015 16GB using Kodi and spmc from google play store but when I choose enable passthrough only spmc allow to use the volumen amplification for low volumen content ,not regular Kodi but if enable passthrough is not enable I can use volumen amplification .

I just got the new shield tv 2017 16GB Installed regular kodi and spmc from google play store and also tried the kodi 17 I can’t use volumen amplification when is enable passthrough in all 3 kodis only when is not enable passthrough but not enable passthrough choose is only 2.0 audio and enable passthrough working is 5.1 audio depends the content.
If someone having the same issue and know how fix it please let me know it maybe at settings don’t know thank you..