Hi Lorenzo Carlà,
The servers were stuck in the Updating state due to subnet IP exhaustion. During maintenance or upgrade operations, PostgreSQL Flexible Server requires additional IPs, and the delegated subnet did not have sufficient usable IP addresses. This impacted 9 servers and blocked the workflow.
We have unstuck the workflow from the backend, and the servers have recovered. To prevent this from happening again especially during future upgrades. we strongly recommend increasing the subnet size, particularly for HA enabled servers. The issue may reoccur if the subnet remains constrained.
Please let us know if you have any questions and concerns.