What is the Atomic Wallet scandal?

I've been hearing rumors about some sort of Atomic Wallet scandal, but I'm not quite sure what it's all about. Could you please elaborate on what this scandal involves? Is it a security breach? An issue with the wallet's functionality? Or perhaps some sort of unethical behavior? I'm curious to know the details and the impact it may have had on users of the wallet. Could you please provide a clear and concise explanation of what's been going on?