Onboard sound device not installed properly on Intel NUC

[snow]

I installed Kubuntu 20.04 on Intel NUC NUC7JY.
The onboard sound card seems not to work properly. Device is mostly not recognized. Sometimes after a while it is there. But it is difficult to say under circumstances it happens. From time to time it is working. Then after a reboot again no sound device.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 5.4.0-39.43-generic 5.4.41
Uname: Linux 5.4.0-39-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.3
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Fri Jun 26 14:58:26 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed maybe-ubiquity quiet splash ---
InstallationDate: Installed on 2020-06-25 (0 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: ubiquity
Symptom: installer
UpgradeStatus: No upgrade log present (probably fresh install)

[snow (mrauschert)]

I just noticed that the sound device is activated around 3 minutes after the login into the desktop.