No DVD audio stream

[Mitsch]

After some time I wanted to watch a DVD with kodi but I got no sound. Everything else works fine (with sound) but DVD won't.
My problem is exactly like "peterfreeth"s one in https://forum.kodi.tv/showthread.php?tid=359403
The kodi player just can't find an audio stream on DVD.

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: kodi 2:18.8+dfsg1-2
ProcVersionSignature: Ubuntu 5.8.0-41.46-generic 5.8.18
Uname: Linux 5.8.0-41-generic x86_64
ApportVersion: 2.20.11-0ubuntu50.5
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: GNOME
Date: Wed Feb 10 22:13:57 2021
InstallationDate: Installed on 2018-10-24 (840 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
RebootRequiredPkgs:
 gnome-shell
 linux-image-5.8.0-43-generic
 linux-base
SourcePackage: kodi
UpgradeStatus: Upgraded to groovy on 2020-11-13 (89 days ago)