After upgrading HA to 2024.12, I noticed all of my thermostats were missing. On further inspection, they were not missing, but renamed. I think I found the change that caused this. I think this breaking change should have been mentioned in the HA release notes, but it wasn’t.
Yes correct. See also Plugwise integration: climate and schedule select entities names changed · Issue #132544 · home-assistant/core · GitHub
HA Core 2024.12.0 release-notes contain some information now: 2024.12: Scene you in 2025! 🎄 - Home Assistant
Cool, thanks for fixing that!