Sangwoon Jung

Thanks for your issue! I'll update version ASAP!

Thanks for your issue! 😄 Notification center is created to check history of notification. Not replace of kibana notification toasts. When a notification toast occurs, the notification center stores it...

I have same needs also, but this issue haven't resolved so long time. So I created new filter plugin for solve this and similar problems. Please see [logstash-filter-memoize](https://github.com/sw-jung/logstash-filter-memoize).