EditText problem getting same values

Android
1

I have following code

nextBTN.setOnClickListener {
            if (validateInfo()) {
                (activity).apply {
                    next(1)
                    user.let {
                        it.firstName = userName.text.toString()
                        it.lastName = lastName.text.toString()
                        it.email = email.text.toString()
                        it.password = password.text.toString()
                    }
                }
            }

Now for the fist time it works fine like
email.text.toString() == n@n.com
but when i try this second time and if i change the value on email edit text field to n11@n.com the email will be same
email.text.toString() == n@n.com
i know it works when i give the this@reference to main class. but wants to learn why is this not working