In the meantime I looked at KODI Issues and found two reporting the same problem:
It seems to be a KODI issue, reproducable on all platforms...
I wondered if there is any good reason not to spin down the harddrives on the LibreElec shutdown/reboot ?
I followed hints found in the internet and:
1) installed "System Tools" add on (to get hd-idle)
2) I created a shutdown.sh script at /storage/.config with the following content:
hd-idle -t sda
hd-idle -t sdb
hd-idle -t sdc
hd-idle -t sdd
and added executable permissions to the file:
chmod +x shutdown.sh
IMHO this could be a default behaviour.
It is about internal subtitles (embedded in mkv files, created from Blurays with CloneBD)
Subtitles are sometimes wrongly positioned in 3D MVC videos.
I'd also like to give my vote for "3D MVC capability on RPi4B"
> 3D is not supported yet on the Pi4.
> It will come but it's not the highest priority.
Please consider to increase the priority of this nice and seldom feature