Upgrading to 11.4.1 firmware did not solve this problem for me. Can anyone from Apple help? This feels like a bug, not a setup error, I've seen a similar question posted this week. I have reinstalled and restarted all my hubs, homepods, etc. All my firmware is up-to-date, still have the issue. Again, the philips hue lights and bridge all work within the Hue app, they also show in my HomeKit app on my iphone/ipad, I CAN control the philips Hue lights from my HomeKit app by pressing the buttons manually, I can also control the Philips Hue lights via Siri on my iPhone/iPad, but I CANNOT control them via Siri from my Homepod. My Homepod IS setup correctly and can control other smart home devices I have installed, JUST NOT the Philips Hue light bulbs. I have an Apple Airport Extreme as my router, if that information helps as well.