Windows Edge Client to NOT remember username and OTP form fields?

Hi all, I only allow Edge Client installed on laptops to connect to F5 APM's Virtual Server. To capture user credentials, a small browser window will pop-up to capture username and password. With the no-password-caching setting, the password form field will always be blank.

 

However, I realize the username field is always populated with previous username and the OTP field is also populated (black dots) with previous pass code.

 

I have even tried editing the Internet Explorer setting to not auto-complete or remember form fields.

 

Any idea on this? Thanks!