This incident has been resolved.
Jan 20, 17:11 PST
A fix has been implemented and we are monitoring as the queue is being worked through.
Jan 20, 12:55 PST
A significant number of iOS Submissions are currently queued due to processing of submissions being much slower than usual. To work around this issue for the moment, you may manually submit your builds using Transporter.
Jan 20, 11:22 PST
The Expo push notification service is under high load and are not responding to requests right now. We are actively investigating this issue and expect to restore service shortly.
Jan 15, 07:00 PST