GNOME Bugzilla – Bug 769500
adwaita: GtkWidget:sensitive animation should not cause "On" to be readable
Last modified: 2016-09-24 14:12:03 UTC
If you have a GtkSwitch that is not sensitive and not active, changing sensitive to TRUE causes the implicit animation to be executed. This results in "On" being briefly visible (with all White text) until the switch handle is dark enough to obscure the text.
eeek, good catch. This is caused since some state of the slider uses background-image and other background-color, I think the best solution is to switch everything back at using background-image.