I have a related problem:
When play a DVD into a usb drive, Kodi resets itself (I use LIBREELEC) in logami I came across "CSS ERROR".
I did some experiments and if the drive is connected via the SATA connector on the motherboard, there is no problem but if I insert it into the usb adapter, the problem is.
I tested on two usb adapters.
I tested on three different drives.
I tested on two computers.
Region settings did not help.
I have a DVD with regions 0 and 2 (I live in Europe).
I set up my own thread but there was no response and now it has disappeared from the list.
(Translated by Google)