When Passcode becomes active again, the domain field is the first responder and the text is selected. This helps make generating passwords even faster. No longer do you have to move your hands from the typing position, to tap the clear button, only to return to the keyboard. This is beneficial when quickly switching between apps. However, the previous domain's text is still available and is selected in the situation that you need to generate the previous password again.
When Passcode becomes active again, the domain field is the first responder and the text is selected. This helps make generating passwords even faster. No longer do you have to move your hands from the typing position, to tap the clear button, only to return to the keyboard. This is beneficial when quickly switching between apps. However, the previous domain's text is still available and is selected in the situation that you need to generate the previous password again.

mdznr/iOS-Passcode