Hi @charlehsao,
It’s hard to say what might be going wrong there without some more information. Can you please tell us:
- When exactly does this happen? You said it works in the Editor, but where does it not work? In Play-in-Editor? In a packaged game?
- How is your level configured? It looks like perhaps the wrong camera is being used to select tiles, but it’s hard to say why without understanding how your project is configured.