Huh… that sounds a proper bug. I don’t really do anything advanced with HomeKit, just my Hue lights.
I wasn’t having the problem you described, but I did get a few odd glitches after the last update. She would sometimes complain that a light couldn’t be found. Turned out to be an extra space at the end of the names of some bulbs… very hard to see in most UIs, it wasn’t until I just idly renamed one in the Hue app that I realized what had happened.
LOL 😆