Web Player/PWA no longer responsive - doesn't render in car mode/mobile layout on Phone

[Ashes_Reliable]

Plan

Premium

Country

USA

Device

Pixel 7a

Operating System

GrapheneOS (Android derivative)

My Question or Issue

Installed PWA no longer renders in responsive/mobile friendly layout on phone. Only renders with desktop layout and pull-to-refresh is disabled. I mention the pull-to-refresh because before, sometimes it would render the desktop layout, and a refresh (or 7) would get it to acknowledge the actual screen size and render responsively.

I understand GrapheneOS is not officially supported as an OS, and the webview (Vanadium, which is chrome based) isn't a supported browser, but everything worked fine until around end of August (2025). Can we get an option to force mobile layout/car-mode, or if recent changes were made to the web client can we investigate that the display size responsivity is still intact? 

[Ashes_Reliable]

It seems on mobile, the query param `utm_source=pwa_install` forces the desktop layout, accessing the site without the param works fine, but when installing as a PWA, that param gets hardcoded.