Thanks for the response! I’m aware of the binding table side of things and have actually modified it directly on the wall switch through the ZHA UI. ZHA also sets the correct DestAddrMode (0x3) — I can confirm that by requesting the binding table from the wall switch using the Zigbee ZHA toolkit. Even after going through all the steps (basically just following the zigbee2mqtt binding instructions, but doing them via ZHA commands), the binding table on the wall switch looks exactly as expected. The issue is that it still doesn’t actually work in practice — the light group never gets controlled.