Styles are not applied/removed when I change the page on youtube

[pabli24]

System Information

• OS: Windows 11
• Browser: Firefox 135
• Stylus Version: stylus-mv2-2.3.5-30c4445

Screenshots, links, CSS

stylus.bug.mp4

@-moz-document url-prefix("https://www.youtube.com/feed/subscriptions") {
    ytd-app {
        background: darkblue !important;
    }
}

The bug is not occurring in Chrome stylus-mv2-2.3.5-30c4445 or in Firefox 1.5.51