Last week, Philips Hue released a firmware update for the Hue Bridge, which should have automatically installed on your system by now. It revolves around the software version 1962097030. Among other things, it fixes the problem where some users were unable to connect to Apple Home via HomeKit. As we have now found out, HomeKit is much more stable than the new Matter.
Firmware update for the Hue Bridge released Improvements for HomeKit and Matter
Improvements for HomeKit and Matter