When using Flip, the Flip-item is now updated correctly

main.lua

@@ -249,7 +249,7 @@ if REPENTANCE then
 		local curFrame = Isaac.GetFrameCount()
 		if not decrease and curFrame == lastGetItemResult[2] and lastGetItemResult[1] ~= nil then
 			local curRoomIndex = game:GetLevel():GetCurrentRoomIndex()
-			EID.flipItemPositions[curRoomIndex][lastGetItemResult[3]] = selectedCollectible
+			EID.flipItemPositions[curRoomIndex][lastGetItemResult[3]] = {lastGetItemResult[1], selectedCollectible}
 		end
 
 		-- Handle crane game
@@ -288,6 +288,22 @@ if REPENTANCE then
 		end
 	end
 	EID:AddCallback(ModCallbacks.MC_POST_PICKUP_INIT, EID.postPickupInit)
+
+	-- Handle Flip Item usage
+	function EID:onFlipUse(_)
+		local curRoomIndex = game:GetLevel():GetCurrentRoomIndex()
+		if EID.flipItemPositions[curRoomIndex] ~= nil then
+			for _,collectible in ipairs(Isaac.FindByType(5, 100, -1, true, false)) do
+				local gridPos = game:GetRoom():GetGridIndex(collectible.Position)
+				local entry = EID.flipItemPositions[curRoomIndex][gridPos]
+				if entry then
+					EID.flipItemPositions[curRoomIndex][gridPos] = {entry[2], entry[1]}
+					collectible:GetData()["EID_FlipItemID"] = {entry[2], entry[1]}
+				end
+			end
+		end
+	end
+	EID:AddCallback(ModCallbacks.MC_USE_ITEM, EID.onFlipUse, CollectibleType.COLLECTIBLE_FLIP)
 end
 
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