Errors showing on login page before submission

I have version 7.0.13 of Theme My Login installed and WordPress 5.2.

If I simply navigate to /login then I see the following errors that I’d only expect on submit:

“ERROR: the username field is empty.” and “ERROR: the password field is empty.”

If I submit the /lostpassword form then I see the same errors as well as “Check your e-mail for the confirmation link.”.

Everything works and this is just a cosmetic issue.

I looked at the render_errors() function in class-theme-my-login-form.php and saw the “login_errors” filter. One option was to override this but you still get an empty error message. Another option that worked was to override ‘authenticate’ and return an empty WP_Error array but this broke other parts of our site.

In the end, I modified the render_errors() function as follows:

if(isset($_POST['submit']))
{
	if ( ! empty( $errors ) ) {
		$output .= sprintf( '<ul class="tml-errors"><li class="tml-error">%s</li></ul>',
			apply_filters( 'login_errors', implode( "</li>\n<li class=\"tml-error\">", $errors ) )
		);
	}
}

I don’t like hacking plugins but this will work for now. It would be good if this bug could be solved in a future update.