MQTT on_connect configuration?

ESPHome
1

Manual lists this configuration example:

on_connect / on_disconnect Trigger

This trigger is activated when a connection to the MQTT broker is established or dropped.

mqtt:
  # ...
  on_connect:
    - switch.turn_on: switch1
  on_disconnect:
    - switch.turn_off: switch1

I made following mqtt config, on_message works, but on_connect and on_disconnect triggers show in editor popups like “[on_connect] is an invalid option for [mqtt]. Please check the indentation. No indentation correction fix the problem”. No indentation modifications help. What is wrong with on_connect in my config?

mqtt:
  broker: "192.168.0.2"
  username: "!secret"
  password: "!secret"
  id: mqtt_client
  topic_prefix: ral/ral-esp8266-relay1
  birth_message:
    topic: mqtt/online
    payload: 'true'
  will_message:
    topic: mqtt/online
    payload: 'false'
  on_connect:
    - mqtt.publish:
      topic: conf/flash_duty_on
      payload: "500"
  on_message:
    - topic: control/buzzer_mute_on
      then:
        - switch.turn_on: sw_buzzer_mute
2

Did you ever figure this out? I’ve been trying to find info on how to log authentication errors but can’t find much at all.