Nevermind, even with 120fps disabled, this still happens. See video
As you can see, the webview refreshes upon switching tabs or resizing the window.
Version 0.99.127.1-beta (WebKit 619.1.1)
Builddate Mar 26 2024
MacBook Pro 2021, 14 inch, M1 Pro, 16GB RAM
macOS Sonoma 14.4.1 (build 23E224)