Yes, can be firmware related. I'll make an eol update to stop support for pyxis.I managed to install the 14.7 version, but the qualcomm h265 codec for the GoPro is NOT included. The h265 videos do not play.
Other than that, the install was this time easy: latest chinese firmware 12.5.3, Bliss 14.7 and OpenGapps nano package. Thanks for that! Finally Bliss again!
Hands free phone calls are also working.
BTW: is the codec support coming from the firmware? Is the chinese firmware the reason? Could then be solved with the global firmware.
I also tried the global firmware (12.5.2) first, but did not work when i tried to install Bliss. The chinese firmware is maybe also the reason, that netflix can not be installed.