Layer won't show when drag item into drop zone

Hello, I'm trying to create this game where if you drop the item into its correct drop zone, a tick will appear, otherwise, an x will appear. I make sure each item has 2 triggers for the tick and the x. For some reason, the first few items work fine, but the later items don't show the tick or the x when dragged into drop zones. I hope someone can help me with this. I attach the story file.