During this time:
* subscription notifications will be slow and may time out.
* this affects both production and sandbox environments
A temporary workaround solution during this time is to avoid using DNS for affected addresses by hard coding IP addresses for the affected hostnames. To do this for PubNub, use 18.104.22.168 for pubsub.pubnub.com.
Update: This issue has been resolved.
More information can be found below: