walk doesn't work on Bank Location

[pokemonhuang 1]

if (!getBank().getClosestBankLocation().getArea(2).contains(getLocalPlayer())) {
    log("we hit here");
    getWalking().walk(getBank().getClosestBankLocation().getCenter());
    sleep(1000, 5000);
}

my problem is "getWalking().walk(getBank().getClosestBankLocation().getCenter())" doesn't work on varrock east mine for some reason.

the return value for this method is false. However, this works on other places such as the desert area and lumbridge mines(places i have used so far). anyone know why this might be?