I returned to the game for Dragonbash and the free chapter returns, and when I started getting enhanced chests I just discarded the items when I saw they weren't good and didn't appear to be collectibles.
I have since learned the Beginner Experience Collection requires you to equip all of those items. Does anyone have advice on reacquiring those chests? Should I consider submitting a ticket?
Update: Using a fresh character in southern Celadon Forest has given me 2 of the relevant chests, at least. So it does not appear to be broken, so I have no need to ticket it. I would still appreciate any tips to killing large groups of enemies in a similarly low level area or if there is a merchant for the relevant items, if anyone has specific advice to that effect.