Buttons on the bar above pictures (fave, like, dislike, hide, etc) do not lose their coloured highlight when toggled off. Only when the page is refreshed do they display correctly.
Edit: Applies only on mobile - looks like it could be due to the mobile not triggering a mouseout event (or similar) based on pc behaviour testing.
Edit2: Tapping elsewhere on the screen clears the highlight correctly, but is not necessarily obvious when trying (and appearing to fail) to turn off a button.