Yes, you are right - through zigbee2mqtt and i guess this is not a node-red problem.
I checked the logs and it sends the commands with a delay of 1 sec
zigbee2mqtt:info 4/15/2019, 1:51:08 PM Zigbee publish to device '0x001788010285e1a8', genOnOff - off - {} - {"manufSpec":0,"disDefaultRsp":0} - null
zigbee2mqtt:info 4/15/2019, 1:51:08 PM MQTT publish: topic 'zigbee2mqtt/0x001788010285e1a8', payload '{"state":"OFF","linkquality":86,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:08 PM MQTT publish: topic 'zigbee2mqtt/0x001788010285e1a8', payload '{"state":"OFF","linkquality":86,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:08 PM MQTT publish: topic 'zigbee2mqtt/0x001788010285e1a8', payload '{"state":"OFF","linkquality":86,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:08 PM MQTT publish: topic 'zigbee2mqtt/0x001788010285e1a8', payload '{"state":"OFF","linkquality":86,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:08 PM Zigbee publish to device '0x001788010290a0d5', genOnOff - off - {} - {"manufSpec":0,"disDefaultRsp":0} - null
zigbee2mqtt:info 4/15/2019, 1:51:08 PM MQTT publish: topic 'zigbee2mqtt/0x001788010290a0d5', payload '{"state":"OFF","linkquality":86,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:08 PM Zigbee publish to device '0x00178801029b1f25', genOnOff - off - {} - {"manufSpec":0,"disDefaultRsp":0} - null
zigbee2mqtt:info 4/15/2019, 1:51:08 PM MQTT publish: topic 'zigbee2mqtt/0x001788010290a0d5', payload '{"state":"OFF","linkquality":84,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:08 PM MQTT publish: topic 'zigbee2mqtt/0x001788010290a0d5', payload '{"state":"OFF","linkquality":84,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:08 PM MQTT publish: topic 'zigbee2mqtt/0x001788010290a0d5', payload '{"state":"OFF","linkquality":84,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:09 PM MQTT publish: topic 'zigbee2mqtt/0x00178801029b1f25', payload '{"state":"OFF","linkquality":86,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:09 PM MQTT publish: topic 'zigbee2mqtt/0x00178801029b1f25', payload '{"state":"OFF","linkquality":65,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:09 PM MQTT publish: topic 'zigbee2mqtt/0x00178801029b1f25', payload '{"state":"OFF","linkquality":65,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'
zigbee2mqtt:info 4/15/2019, 1:51:09 PM MQTT publish: topic 'zigbee2mqtt/0x00178801029b1f25', payload '{"state":"OFF","linkquality":65,"brightness":254,"color_temp":366,"color_mode":2,"color":{"x":0.457,"y":0.41}}'