Picom sometimes doesn't repaint gtk 3 with nvidia driver 590.44.01

Seeing the same flickering behavior as of today on Arch with 590.48.0.1; earlier (starting sometime around the 18th?) those damaged sections just weren’t being repainted whatsoever, until I forced a redraw by e.g. resizing the window.

$ yay -Qs nvidia
local/cuda 13.1.0-1
    NVIDIA's GPU programming toolkit
local/egl-gbm 1.1.2.1-1
    The GBM EGL external platform library
local/egl-wayland 4:1.1.21-1
    EGLStream-based Wayland external platform
local/egl-wayland2 1.0.0.rc.r51.gada1c37-1
    EGLStream-based Wayland external platform (2)
local/egl-x11 1.0.4-1
    NVIDIA XLib and XCB EGL Platform Library
local/lib32-libvdpau 1.5-3
    Nvidia VDPAU library
local/lib32-nvidia-utils 590.48.01-1
    NVIDIA drivers utilities (32-bit)
local/libvdpau 1.5-3
    Nvidia VDPAU library
local/libxnvctrl 590.48.01-1
    NVIDIA NV-CONTROL X extension
local/linux-firmware-nvidia 20251125-2
    Firmware files for Linux - Firmware for NVIDIA GPUs and SoCs
local/nvidia-open 590.48.01-3
    NVIDIA open kernel modules
local/nvidia-settings 590.48.01-1
    Tool for configuring the NVIDIA graphics driver
local/nvidia-utils 590.48.01-1
    NVIDIA drivers utilities
local/opencl-nvidia 590.48.01-1
    OpenCL implemention for NVIDIA
$ nvidia-smi
Sat Dec 27 14:23:17 2025
±----------------------------------------------------------------------------------------+
| NVIDIA-SMI 590.48.01              Driver Version: 590.48.01      CUDA Version: 13.1     |
±----------------------------------------±-----------------------±---------------------+
| GPU  Name                 Persistence-M | Bus-Id          Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |           Memory-Usage | GPU-Util  Compute M. |
|                                         |                        |               MIG M. |
|=========================================+========================+======================|
|   0  NVIDIA GeForce GTX 1660 …    Off |   00000000:03:00.0  On |                  N/A |
| 25%   43C    P5             26W /  125W |     932MiB /   6144MiB |     24%      Default |
|                                         |                        |                  N/A |
±----------------------------------------±-----------------------±---------------------+

±----------------------------------------------------------------------------------------+
| Processes:                                                                              |
|  GPU   GI   CI              PID   Type   Process name                        GPU Memory |
|        ID   ID                                                               Usage      |
|=========================================================================================|
|    0   N/A  N/A            1375      G   /usr/lib/Xorg                           297MiB |
|    0   N/A  N/A            1567      G   picom                                    40MiB |
|    0   N/A  N/A            1816      G   /usr/lib/firefox/firefox                326MiB |
|    0   N/A  N/A            2040      G   /opt/discord/Discord                     39MiB |
|    0   N/A  N/A            4660      G   …share/Steam/ubuntu12_32/steam          2MiB |
|    0   N/A  N/A            4854      G   ./steamwebhelper                         16MiB |
|    0   N/A  N/A            4888      G   …am/ubuntu12_64/steamwebhelper        149MiB |
|    0   N/A  N/A          247315      G   alacritty                                 8MiB |
±----------------------------------------------------------------------------------------+