This incident has been resolved.
Dec 18, 21:05 EST
Everything appears stable again, hardware died on AWS side which was related to the networking between the services so it was slowly degrading rather than taking everything out, so you got intermittent errors.
A restart moved the affected instance hosting that networking service to new hardware per AWS recommendations. We are still monitoring to confirm complete resolution.
Dec 18, 20:43 EST
We've identified a hardware failure on the AWS in Sydney which is affecting network connectivity. We are working with AWS to bring the affected services back online.
Dec 18, 20:21 EST