I just returned this game a few months ago, found during Halloween's event that Headless Horseman's Hearthstone is not in the travel module's checklist.

Currently, if a player has only Headless Horseman's Hearthstone as Hearthstone replacement then they won't be able to invoke hearthstone from travel module. Item ID is 163045 so it should be a one-line change in travel module.

163045, -- Headless Horseman's Hearthstone

Verified working locally, can you add this to next iteration? Thanks! (I only have this hearthstone replacement :P )