BuddyPress.org

Well, yes, that would prevent the loop: the loop happens on wp-login.php, but not on /register/

Enabling registration doesn’t affect the problem. The problem’s cause is that in bp-core/bp-core-catchuri.php , function bp_core_set_uri_globals , when viewing wp-login.php, $component_index = 1 , but $bp_uri =array([0] => ‘wp-login’)