show – Display flickering with vertical strains

I’ve an exterior monitor, Samsung U32R59x, that begins to flicker with vertical strains beneath sure situations. My pc is a Macbook Professional, 2022, with an M2-processor. MacOS was reinstalled as soon as I obtained the pc, and the difficulty began instantly.

I’ve not found out a sample for the flickering, however it usually occurs once I browse sure pages in Mozilla Firefox. It additionally happens when utilizing different software program. The identical web site in Firefox does not set off the flickering each time.

I recorded a video of the flickering.

I imagine it’s one thing software-related: I click on onto a tab with black background, and the display screen sparkles, and as quickly as I click on right into a tab with gray background, it stops.
This additionally occurs if I focus away from a program, i.e. click on on the background.

I’ve linked my Macbook to different screens, and have by no means skilled this.
I’ve used different computer systems on this specific display screen and by no means skilled this.

Beneath is the graphics tab of System Report (sorry, in Danish)

Apple M2:

  Chipsæt-model:    Apple M2
  Sort: GPU
  Bus:  Indbygget
  Antal kerner i alt:   10
  Producent:    Apple (0x106b)
  Metallic-understøttelse: Metallic 3
  Skærme:
U32R59x:
  Opløsning:    3840 x 2160 (2160p/4K UHD 1 – Extremely Excessive Definition)
  UI ligner:    3840 x 2160 @ 60.00Hz
  Hovedskærm:   Ja
  Dublering:    Fra
  On-line:   Ja
  Rotation: Understøttet
LCD-farveskærm:
  Skærmtype:    Indbygget Retina LCD
  Opløsning:    2560 x 1600 Retina
  Dublering:    Fra
  On-line:   Ja
  Juster lysstyrke automatisk:  Ja
  Tilslutningstype: Intern

Are there configuration choices that permit me to eliminate the flickering?
I’ve tried completely different resolutions and cables.