Hello,
I wanted to share my experience with a recent bug I am having to see if anyone else is having the same issue.
Recently, all of my devices will show as unresponsive on the Home app sometimes, and it will typically be accompanied by my Home Hubs also being unresponsive.
Sometimes it works just fine.
My iPhone is on the Developer Beta, as is my Apple TV 4K. However, my HomePod mini is on the 26 Beta still. The other members of my household are on the latest official release version.
There is also another issue my Apple TV 4K is having... but I will make a separate post for that.
Let me know if you are also experiencing this.