Hello there @stripecreative,

I appreciate you trying to resolve the issue by clearing cache and using new/private browsers.

To better isolate this issue, let's try to create another custom invoice template. Then, on the Payments tab, hover your mouse and click the empty box beside the Bank transfer option. This is to enable the ACH payment options on your transaction. 

If the same issue persists, I recommend contacting our QuickBooks Payments care team. They have the resources to check the status of your account and help you with the necessary steps to enable ACH payments.

Let me know how the call goes by leaving a comment through this thread. I'll be waiting for your response. Take care always.