So I've been using this configuration for quite a while now but have had a new issue pop up over last few months. I don't think it's a Hubitat issue directly but thought I'd start with enthusiasts for ideas.
I have a C8 Pro and about 50 Lutron devices with the Lutron Pro Hub. All of those devices are exposed to HomeKit using the HomeKit app in Hubitat. I've been using HomePods and Siri to control lights for years, it's been crazy stable.
Something I say every day is "Siri, dim living room main to 15%". This worked prior to iOS18. Now Siri takes the command but doesn't actually do anything. I can see the switch on the wall receives a command as the LED lights up, but what it is receiving is whatever the existing dim level is. If I go into the Home App on my iPhone and slide the dimmer slider on the living room main light then the light does actually change.
Here are a few images of the logs. In the first image, at the bottom, you can see the 15% getting sent via the Home app on the iPhone. The rest of the logs above are me asking Siri to set the light to 15%. The value isn't being sent through.
The second image is the device logs showing the raw commands. I was asking Siri to set the light to 25% or 50%. The command that gets sent through is just the existing 15% as the light was on.
Hoping to figure this out and would appreciate any suggestions.