EDIT (December 15 at 10.15(UTC+0))- The Tooltip has now been fixed and should show the correct information.
Festival Bonus Chests only contain Crafting Materials and Emblems. The list of items currently shown in the tooltip is incorrect. This is only a tooltip issue, and the configuration of the chests has not changed. We are working on fixing the tooltip as soon as possible. Our apologies for the inconvenience caused by this issue!