Is it even possible to hook those resources lying on isolated (i.e. single tile right behind a mountain) or island tiles? I tried to do so with an isolated tile, building the requiered mine and even a road (though it had coast communication and was fully within my territory). It did not appear as a resource in any of my cities.
If it is a bug it would be nice to see it fixed, if not, it would be a little bit inconsistent behaviour, that I would be happy to see corrected.
If it is a bug it would be nice to see it fixed, if not, it would be a little bit inconsistent behaviour, that I would be happy to see corrected.