Flickering on low refresh rate

[worm-in-concrete]

When the capture refresh rate is low, the LEDs start flickering.

Like on 1 or 2 fps. I leave the screen idle for a few seconds, and when the refresh rate drops, the LEDs start blinking. Is there any hotfix to prevent the refresh rate from dropping below the configured value?

I have HDR enabled. PatrickSiegler.PrismatikUnofficial ver. 5.11.2.31, installed through winget.