Memory leak in Web Page mode

[yiannis-p]

There is a possible memory leak in Hidamari's Web Page mode.
After running for a few hours, the wallpaper stops working and the following error is displayed in the console:
Unable to shrink memory footprint of process (16384 MB) below the kill thresold (16384 MB). Killed

The error message appears to come from Webkit.
https://github.com/WebKit/WebKit/blob/main/Source/WTF/wtf/MemoryPressureHandler.cpp

To make sure it wasn't a leak in my web page's code, I tested the page in another WebKit browser (Epiphany). Both were run on Ubuntu using Flatpak:
Hidamari io.github.jeffshee.Hidamari 3.4
Web org.gnome.Epiphany 45.2

Hidamari's WebKitWebProcess process grew steadily at about 35MB/min and eventually died at 16GB memory used.
Epiphany's WebKitWebProcess did not appear to leak, and sat at 260MB-280MB memory used for the entire time.

A cut down/standalone example HTML file is attached.
memory_leak.html.txt