Mqtt groups stop working - bug

Hi. I use MQTT. I’m testing a simple setup to isolate an issue. All Zigbee bulbs will stop working individually, but not in the group.

Under “groups” it shows all 4 bulbs listed, as it should. I can scroll down and control each one individually without issue, however the group will not actually control the lights. It “thinks” it is controlling the group because the toggles for each light move on/off but the physical lights do not change.

I tried all the obvious, resyncing each light, rebooting, etc. Another reason for thinking this is a “bug” is that the devices that are already in the group are in the list to add to the group. If you add them then it does not change anything on the screen however it does fix the problem and the group starts working. It’s as if it visually remembers the devices are in the group but operationally it completely forgets. Doing that is the only thing that fixes the issue.

Any suggestions on how to fix or who to let know that there’s a bug?

Thank you!