Polczak Can you test this update if it fixes your HDMI audio issue? You have OrangePi PC+, right?
It contains this fix, which might solve issue you have: drm/rockchip: hdmi: fix no sound some time · Kwiboo/[email protected] · GitHub
For some reason I was not able to restore backup from this file: libreelec-h3.arm-9.1-devel-20190605180056-cdc4ec0-orangepi_pc_plus.tar
Then I write newest image: LibreELEC-H3.arm-9.1-nightly-20190605-c7f2098-orangepi_pc_plus.img.gz then I tried to restore backup and Kodi is running now only in Safe mode (red screen), can't run normally.
No changes to audio.
After restore backup Kodi version still shows: nightly-20190605-c7f2098.