QtWebEngine on high-DPI Xorg causes a row of pixels to disappear halfway down the screen every third window height

When using any QtWebEngine-based browser - I have tested qutebrowser and Falkon - on a high-DPI Xorg display (my display is 1920×1080, and I set `Xft.dpi: 144` in my Xresources), every third window height will cause a row of pixels to disappear halfway down the screen. Note that the row is in the same place, regardless of page scroll.

I have attached a video of the described behaviour with qutebrowser, which shows me resizing a window pixel-by-pixel, making the effect very noticeable: 2025-01-09 17-50-59.mp4

Edit: Turns out this also happens horizontally as well; every third window width causes a column of pixels to disappear