diff -urpN gnome-control-center-3.30.1.orig/panels/user-accounts/run-passwd.c gnome-control-center-3.30.1/panels/user-accounts/run-passwd.c
--- gnome-control-center-3.30.1.orig/panels/user-accounts/run-passwd.c	2019-12-28 23:02:47.839960163 +0800
+++ gnome-control-center-3.30.1/panels/user-accounts/run-passwd.c	2019-12-28 23:03:41.180636928 +0800
@@ -404,7 +404,7 @@ io_watch_stdout (GIOChannel *source, GIO
 
                         if (is_string_complete (str->str, "assword: ", "failure", "wrong", "error", NULL)) {
 
-                                if (strstr (str->str, "assword: ") != NULL) {
+                                if (strstr (str->str, "assword: ") != NULL && strstr (str->str, "Current") == NULL) {
                                         /* Authentication successful */
 
                                         passwd_handler->backend_state = PASSWD_STATE_NEW;