Ikea Hub - why does it cause so much pain after upgrades?

I have a very simple setup, mostly Ikea bulbs and a few switches, some zigbee stuff and a few TP link sockets.
After the latest update the Ikea hub and everything connected to it have disappeared. I have powered off/on the hub and I have removed the integration and re-added it.
This normally fixes the issue, but this time the IP box for the security code has been sitting with a spinner for the last 1.5 hours.
Any ideas of how to restore everything before I just start a fresh HA install?