Default transition for groups. https://github.com/Koenkk/zigbee2mqtt/issues/1948

lib/extension/entityPublish.js

@@ -87,6 +87,7 @@ class EntityPublish {
         } else {
             converters = groupConverters;
             target = entity.group;
+            options = entity.settings;
         }
 
         // Convert the MQTT message to a Zigbee message.