Comment 3 for bug 1729340

Additionally, taking GNOME Builder (from the Ubuntu archive) as an example: the window always uses the inverted gradient, without having to maximize it. Might be due to Builder adding another CSS class called "workbench" to its main window (GTK_DEBUG=interactive), throwing off GTK somehow.

Putting myself in the mindset of an app developer who wants to target different distros with different default themes, I'd be rather confused.