Graphical glitches appear on menus and windows after a while

[Salve J. Nilsen]

Hardware:

Intel NUC10i7FNH

1) lsb_release -rd

Description: Ubuntu 20.10
Release: 20.10

2) apt-cache policy intel-media-va-driver-non-free

intel-media-va-driver-non-free:
  Installed: (none)
  Candidate: 20.2.0+ds1-1
  Version table:
     20.2.0+ds1-1 500
        500 http://no.archive.ubuntu.com/ubuntu groovy/multiverse amd64 Packages

Graphical glitches appear after a while of regular use (e.g. playing videos).

No glitches appear after switching to the free driver.

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: intel-media-va-driver-non-free (not installed)
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
Uname: Linux 5.8.0-25-generic x86_64
ApportVersion: 2.20.11-0ubuntu50
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 23 23:50:14 2020
InstallationDate: Installed on 2020-09-29 (24 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: intel-media-driver-non-free
UpgradeStatus: Upgraded to groovy on 2020-10-12 (11 days ago)