Annoying white bar in certain Flatpak apps (Discord, VSCodium, etc)

[ilikelinux]

Looks something like this:

Spotify and Visual Studio Code no longer have dark title bars

I noticed after upgrading to Fedora 38 that Spotify and Visual Studio Code both no longer set the GTK title bar to dark. Is there anything that can be done to let them set dark titlebars again?

Seams to be a inconsistency of gtk3 <> gtk4 in the theme.