I am having a similar issue. I am currently dealing with other issues, and hope to write a script to correct this issue as a kludge, but it would be nice if someone could help determine why it is happening in general.

I found something in recalbox.log: ---- recalbox-config.sh ---- [       25.90] : setting audio volume : 90 [       25.94] : setting audio output mode : auto numid=3,iface=MIXER,name='PCM Playback Route' The value is 90. Maybe I can fix this in recalbox-config.sh; but where can I find this Shell-file?