Disable system generated password notice bug

i have enabled the option ” Disable system generated password notice”.
I have done some tests, after registering a new user, in the login mode I enter the credentials, I press login but I do not log in, it remains in loading.
if i try to access from website/wp-admin i get the screen to change the secure password in order to access. if i make the change with the secure password generation and return to the front end everything works.
how can i solve the problem?