We also have the same issues. All the patches are installed.
1. Transfer fails and says "error obtaining customer ID'. After accepting mannualy, transfer is initiating.
2. Domain registration fails , if new customer sign up , after accepting mannualy , domain is registering.
If the customer is old, domain registration gone fine.
3. Upcoming Domain Renewal Notice not sending to customers.
Please look at this issues and fix as soon as possible!