Well a workaround is to install the caffeine gnome extension https://extensions.gnome.org/extension/517/caffeine/ so that is disable dimming with the applications you choose (you can do it in the caffeine settings)
Well a workaround is to install the caffeine gnome extension https://extensions.gnome.org/extension/517/caffeine/ so that is disable it disables dimming with the applications you choose (you can do it in the caffeine settings)