I have 3 Ikea blinds set up in zigbee2mqtt as a group. HA sees the 3 individual blinds as well as the group as a cover object. I can open/close the individual blinds via cover commands in HA, but not the group. The MQTT messages HA is sending out look the same for the individual vs. group cover commands (aside from the name of the entity). Am I setting up groups wrong?
I’m having the same issue, did you ever figure this out?
Have you renamed the group within HA? This can cause HA to send the wrong name to Z2M and therefore Z2M doesn’t recognise it.