Sort of a suggestion and bug in one really. When I'm visiting my friends' islands and I'm clicking their icons in the bottom bar they switch positions and change order seemingly at random? It makes it hard to track which islands I've visited already and which I have not since I have like 20 friends playing the game.

I'd also like to suggest adding a 'next friend' button at the right side of the screen? That way you can quickly cycle through all of your friends' islands in order (of their XP presumably).

Thanks Bytrix.

There's now a Thumbs Up icon that displays on friends you have visited today.
The order of friends will change as they come and go offline.