Meruna Sirens can trigger white artifacts on the Linux Client. Frequently they will be flickering, but not always.
I was able to trigger the bug in a stable enough scenario to take the screenshot below. In this case the white wasn’t flickering, the white artifacts were steady while walking around the immediate (2-3 Sentinel height) area
I went off screen and waited for the corpse to despawn and when I returned everything rendered normally without any problems.
I had experienced a similar bug with the last 0.8.5 patch and with 0.9.0 at release, but it was difficult to pin down as the effect was a large white splotch covering the effected enemies.
System info:
Arch Linux
Kernel : 6.2.6
GPU: AMD RX6600
Drivers: Mesa-git (compiled this morning 3/15/23)