[Bug] Why am I encountering this page jitter with Stylebot on Cryptee (notes web app) despite basic CSS?

[wuuulll]

When interacting with a note with Stylebot enabled, there's a stuttery constant jitter that renders the page unuseable and I have to reload. So far, only interacting with this one particular note causes this, and only sometimes, not every single time is it reproduceable. For privacy purposes, I had to crop the screen recording but it should capture the crux of the issue.

I'm using a PWA with Brave 1.78.97 on Fedora 42.

Screen recording of issue: https://streamable.com/zhsz11

This is the only css I am using:

div div div {
background-color: #27252b;
color: #ffffff;
}

b.fader {
background-color: #27252b;
}

body.app-body.fixed {
background-color: #27252b;
}

pre.ql-syntax {
background-color: #332b3b;

}