@Martorias: I’m using a Sony AVR STR-DN1080 with no issues regarding Atmos and DTS-X. I compared your audio and video settings with my actual configuration and would like you to test the following settings, to see whether this makes any difference:
- settings → player → adjust display refresh rate to always or start/stop (this should be set in any case!)
- settings → system → audio → output device to AML-MESONAUDO, HDMI
- settings → system → audio → stereoupmix to NO
- settings → system → audio → keep audio device active to ALWAYS
- settings → system → audio → send low volume noise to TRUE
It cannot hurt to de-energize your AVR for a minute or so.
A fresh set of logs afterwards would be helpful if and only if the problem persists.