No need to use jquery proxy.

luigi/static/visualiser/js/visualiserApp.js

@@ -218,7 +218,7 @@ function visualiserApp(luigi) {
     }
 
     function processWorker(worker) {
-        worker.tasks = worker.running.map($.proxy(taskToDisplayTask, false, null));
+        worker.tasks = worker.running.map(taskToDisplayTask);
         worker.start_time = new Date(worker.started * 1000).toLocaleString();
         worker.active = new Date(worker.last_active * 1000).toLocaleString();
         return worker;