Just use below snippet by using this snippet you can maintaining login status after successful login. You just need to add this snippet code in a function.php file if you want to maintain login status.

after-login-registration.php

add_action( "wcalr_after_login", 'wcalr_after_login_func', 10, 1 );
function wcalr_after_login_func($user_signon){
	wp_set_current_user($user_signon->ID);
	wp_set_auth_cookie($user_signon->ID);
}