#6 and #9 fixed

custom_resources/card_pile.gd

@@ -30,6 +30,28 @@ func clear() -> void:
 	card_pile_size_changed.emit(cards.size())
 
 
+# We need this method because of a Godot issue
+# reported here: 
+# https://github.com/godotengine/godot/issues/74918
+func duplicate_cards() -> Array[Card]:
+	var new_array: Array[Card] = []
+
+	for card: Card in cards:
+		new_array.append(card.duplicate())
+
+	return new_array
+
+
+# We need this method because of a Godot issue
+# reported here: 
+# https://github.com/godotengine/godot/issues/74918
+func custom_duplicate() -> CardPile:
+	var new_card_pile := CardPile.new()
+	new_card_pile.cards = duplicate_cards()
+
+	return new_card_pile
+
+
 func _to_string() -> String:
 	var _card_strings: PackedStringArray = []
 	for i in range(cards.size()):

scenes/battle_reward/battle_reward.gd

@@ -60,7 +60,7 @@ func _show_card_rewards() -> void:
 	card_rewards.card_reward_selected.connect(_on_card_reward_taken)
 
 	var card_reward_array: Array[Card] = []
-	var available_cards: Array[Card] = character_stats.draftable_cards.cards.duplicate(true)
+	var available_cards: Array[Card] = character_stats.draftable_cards.duplicate_cards()
 
 	for i in run_stats.card_rewards:
 		_setup_card_chances()

scenes/player/player_handler.gd

@@ -25,7 +25,7 @@ func _ready() -> void:
 
 func start_battle(char_stats: CharacterStats) -> void:
 	character = char_stats
-	character.draw_pile = character.deck.duplicate(true)
+	character.draw_pile = character.deck.custom_duplicate()
 	character.draw_pile.shuffle()
 	character.discard = CardPile.new()
 	relics.relics_activated.connect(_on_relics_activated)

scenes/shop/shop.gd

@@ -48,7 +48,7 @@ func _blink_timer_setup() -> void:
 
 func _generate_shop_cards() -> void:
 	var shop_card_array: Array[Card] = []
-	var available_cards := char_stats.draftable_cards.cards.duplicate(true)
+	var available_cards: Array[Card] = char_stats.draftable_cards.duplicate_cards()
 	RNG.array_shuffle(available_cards)
 	shop_card_array = available_cards.slice(0, 3)