Let me guess... It's Binance, these guys are notorious for this and I have run into this one too many times and these days I try to minimise getting coins over there because we don't know what they will do tomorrow . And with their license changes of migrating to Dubai, I hope this isn't them protecting themselves from any legal actions and any unforeseen circumstances.
Anyway we await for another decentralized/ semi decentralized platform to join this business to bridge the gap that other platforms have left.
So, that's not only me who has faced this kind of issue. I also have experienced this drama, and as far as I remember, this happened with me this year in the month of March. Where exchange left me a message that you have to give all the proofs of your transaction, and in case I do not provide them with the information, they said they will restrict your account. That surprised me badly, like TBH the transaction was fair, but I don't know why they asked me for it.
Maybe exchange intentionally needed more personal information about me at that time, which I really hate a lot, and this feels me like more and more KYC platforms. Well, i have to provide all the information that they asked me to close that case and littery this shit repeat itself two times i mean the same case was opened two times with me.