text field with validationMinCharacters turns red when it resigns first responder

[jpaas]

I have a login form with a validationMinCharacters of 6 on my password field. When the field is invalid I set the text to be red.

As soon as the field resigns first responder the text turns red even if the field contents are valid.

Here's the weird part... Its not my code that turning it red. I've set breakpoints and logging statements, and my invalid handler is not being called. It only seems to happen with the validationMinCharacters validator.

Any idea what's happening here?