kb: event fix

src/lv_objx/lv_kb.c

@@ -355,6 +355,7 @@ void lv_kb_def_event_cb(lv_obj_t * kb, lv_event_t event)
         } else {
             lv_kb_set_ta(kb, NULL); /*De-assign the text area  to hide it cursor if needed*/
             lv_obj_del(kb);
+            return;
         }
         return;
     } else if(strcmp(txt, LV_SYMBOL_OK) == 0) {