I had been receiving funds in my Binance account. One of my clients sent me 15 BNB there, and he had used Tornado Cash to mix his BNB.
Since it's already sanctioned mixer, It makes sense and worse still Binance is still having issue with regulators over "assisting" money launders to launder money through their platform. I don't think they are ready for more fines and sentencing.
So after receiving funds, Binance froze my account. Even they don't ask for any explanation.
These are the things Binance never used to do. Times have changed
At least, I am glad they let you withdraw your funds.