Confirmed, and it's a real bug. The cap sitting in your bag and the cap Bari is asking for are two separate entries in our item list that happen to share a name and a picture: the Orange Mushroom drops the old hand-written "Orange Mushroom Cap", while the quest counts the imported one. They never match, so the counter stays at 0/1 no matter how many you carry.

The same duplication hits Snail Shell, Blue Snail Shell, Red Snail Shell and Mushroom Spore — which is exactly why your quest tracker shows "Mushroom Spore 0/5" stuck at zero for Maria's Nutritious Juice while "Squishy Liquid 1/1" works, since Squishy Liquid only exists once in our list.

The fix is to retire the five duplicates, point the drop tables and icons at the imported items, and add a migration so the caps and shells already in people's bags carry over instead of vanishing. Alongside this file, the same five keys need updating in dropsV83.gen.ts (5 rows), GameConfig.ts (the 5 hand item defs and the 5 MOB_DROPS rows), IconLoader.ts (5 icon paths) and sceneSkills.ts:50 (the Three Snails icon lookup).

You were right — the cap was in your bag and Bari refused to see it. Internally the game had TWO entries for the same item: the Orange Mushroom drops one called ORANGE_MUSH_CAP, but Bari's quest was asking for one called V83_4000001, and the counter only matches names exactly. So it sat at 0/1 forever no matter how many caps you carried. Your screenshot of the Etc tab was the proof. This fixes the same fault on 31 collect objectives in total, not just Bari's — Orange Mushroom Cap, Snail Shell, Blue Snail Shell, Red Snail Shell, Mushroom Spore and Red Potion were all affected (that's also why 'Maria's Nutritious Juice' showed Mushroom Spore 0/5 in your shot). The quest now counts, and consumes, the item you actually picked up.