I have a hard time imagining a scenario in which my hard-earned, fully-documented, all-taxes-paid cash, withdrawn from my account can amount to money laundering. But whatever.
Pro-tip: Announce you are aware of the CSR/SAR they now have to file, and apologize for the inconvenience. Tends to put them at ease.
Be aware, you'll still draw elevated attention for a while. Isn't AML grand?