Related bugs:
https://bugzilla.gnome.org/show_bug.cgi?id=674793 - this was fixed in Adwaita, then later it was rolled back.
https://bugs.launchpad.net/ubuntu/+source/light-themes/+bug/988240 (i marked this as a duplicate).
Seems like an easy fix in the theme styling, unless there is some other underlying technical reason for which they had to roll back the fix in Adwaita.
Related bugs:
https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 674793 - this was fixed in Adwaita, then later it was rolled back.
https:/ /bugs.launchpad .net/ubuntu/ +source/ light-themes/ +bug/988240 (i marked this as a duplicate).
Seems like an easy fix in the theme styling, unless there is some other underlying technical reason for which they had to roll back the fix in Adwaita.