Do you have to do something special to make it work? I created a guild and the Hasty Hearth perk shows in my spellbook, but my hearth cooldown is still 30 minutes. Do I need guild rep or something? Sorry for the dumb question, I’ve just been on a long hiatus. TIA!
It should just be automatic. Chances are, it’s just a display bug on the hearthstone tooltip. Have you tried relogging to see if it gets the tooltip to update? Are you running any addons that might be messing with the tooptips? Have you tried using the hearthstone and seeing what cooldown actually applies?