Flickering when resizing splits via keybindings

[aplzr]

Issue Description

Screen flickers when resizing splits via the resize_split keybindings, but not when done via mouse.

Video where I resize splits via keybinding, then via mouse, then via keybinding again:

ghostty-split-resize-flicker.mp4

This is a duplicate of #8208, which was closed with a fix that went into 1.3.0, but the problem can still be observed in 1.3.1. #8733 and #8773 are duplicates with additional videos.

Edit: Just noticed open issue #11187, which I had missed previously.

$ localectl status
System Locale: LANG=en_US.UTF-8
    VC Keymap: de
   X11 Layout: de
    X11 Model: pc105

$ inxi -Gx
Graphics:
  Device-1: NVIDIA GA102 [GeForce RTX 3080] vendor: EVGA driver: nvidia
    v: 595.71.05 arch: Ampere bus-ID: 2d:00.0
  Display: wayland server: X.org v: 1.21.1.22 with: Xwayland v: 24.1.11
    compositor: kwin_wayland driver: gpu: nv_platform,nvidia,nvidia-nvswitch
    resolution: 1: 3840x2160~60Hz 2: 3840x2160~60Hz
  API: EGL v: 1.5 drivers: nvidia,swrast platforms:
    active: gbm,wayland,x11,surfaceless,device inactive: device-1
  API: OpenGL v: 4.6.0 compat-v: 4.5 vendor: nvidia mesa v: 595.71.05
    glx-v: 1.4 direct-render: yes renderer: NVIDIA GeForce RTX 3080/PCIe/SSE2
  API: Vulkan v: 1.4.341 drivers: nvidia,llvmpipe surfaces: N/A devices: 2
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor gpu: amd-smi, nvidia-settings, nvidia-smi
    wl: wayland-info,wlr-randr x11: xdriinfo, xdpyinfo, xprop, xrandr

Expected Behavior

Resizing via keybinding is similarly smooth as via mouse and without flickering.

Actual Behavior

The screen flickers.

Reproduction Steps

With default configuration:

1. Open ghostty
2. Split surface (ctrl + shift + {e,o})
3. Resize split via keybinding (super + ctrl + shift + arrow_{up,down,left,right})

Ghostty Logs

ghostty_flicker.log

Ghostty Version

Ghostty 1.3.1-2.fc44

Version
  - version: 1.3.1-2.fc44
  - channel: tip
Build Config
  - Zig version   : 0.15.2
  - build mode    : .ReleaseFast
  - app runtime   : .gtk
  - font engine   : .fontconfig_freetype
  - renderer      : renderer.generic.Renderer(renderer.OpenGL)
  - libxev        : io_uring
  - kernel version: 6.19.14-ogc5.1.fc44.x86_64
  - desktop env   : other
  - GTK version   :
    build         : 4.22.3
    runtime       : 4.22.4
  - libadwaita    : enabled
    build         : 1.9.0
    runtime       : 1.9.0
  - libX11        : enabled
  - libwayland    : enabled

OS Version Information

Bazzite 44.20260515.0 (Kinoite)

(Linux only) Display Server

Wayland

(Linux only) Desktop Environment/Window Manager

KDE plasmashell 6.6.4

Minimal Ghostty Configuration

Default configuration (no config file).

Additional Relevant Configuration

No response

I acknowledge that:

• I have reviewed the FAQ and confirm that my issue is NOT among them.
• I have searched the Ghostty repository (both open and closed Discussions and Issues) and confirm this is not a duplicate of an existing issue or discussion.
• I have checked the "Preview" tab on all text fields to ensure that everything looks right, and have wrapped all configuration and code in code blocks with a group of three backticks (```) on separate lines.