I recently purchased 2 of these units and connected them to HA via zigbee2mqtt, they both were discovered fine and presented as a 4 switch controller in HA.
I set them up to turn various devices on/off via single button press which all worked fine. Upon further use I noticed that when no buttons have been pressed for a while, when a button is first pressed nothing happens (get an led confirmation flash on button but no mqtt/HA log entry), pressing button again and all works normally. This is 100% repeatable and not a random delay.
Has anyone experienced this with these devices? Is there a fix?