Lovelace: MQTT sensors not in dropdown lists and can't be uses on several card

Configuration
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1

I have some MQTT sensors defined (motion, power consumption, …). But none of them is shown in any dropdown list in Lovelace. But they exist and I can use them manually, for example, I can define this history-graph, the state of the entities is shown, the entities are listed when I edit the card, but I can’t select them. The only way to use them is to know the entity ID and to write it manually in the YAML editor.

entities:
  - sensor.luftung_leistung
  - sensor.luftung_verbrauch
  - sensor.motion_terrasse
hours_to_show: 72
refresh_interval: 120
title: Test MQTT sensors
type: history-graph

In the history-graph I can manually use them.

But when I use them on a sensor card, where they worked fine in the past

entity: sensor.luftung_leistung
hours_to_show: 72
id: test_luftung_leistung
title: Lüftung Leistung
type: sensor

I get on the right:

Entity not available: sensor.luftung_leistung

These MQTT sensors are also not shown in the list of existing entitites, in dropdown lists for automations, scripts and so on. It looks like Lovelace doesn’t know them.

I can’t say in which release this happened, because history graphs where they are used still showing the content. I found this issue only now when I was looking for the history of some specific sensors.

This is my definition in configuration.yaml

sensor:
  - platform: mqtt
    name: "Helligkeit Terrasse"
    state_topic: "/SmartHome/BewegungT/brightness"
    unit_of_measurement: "Licht"
  - platform: mqtt
    name: "Helligkeit Vorhof"
    state_topic: "/SmartHome/BewegungV/brightness"
    unit_of_measurement: "Licht"
  - platform: mqtt
    name: "State Terrasse"
    state_topic: "/SmartHome/BewegungT/state"
  - platform: mqtt
    name: "State Vorhof"
    state_topic: "/SmartHome/BewegungV/state"
  - platform: mqtt
    name: "Motion Terrasse"
    state_topic: "/SmartHome/BewegungT/motion"
  - platform: mqtt
    name: "Motion Vorhof"
    state_topic: "/SmartHome/BewegungV/motion"
  - platform: mqtt
    name: "Bewegung Anz Terrasse"
    state_topic: "/SmartHome/BewegungT/trigger_cnt"
    unit_of_measurement: "Bewegung"
  - platform: mqtt
    name: "Bewegung Anz Vorhof"
    state_topic: "/SmartHome/BewegungV/trigger_cnt"
    unit_of_measurement: "Bewegung"
  - platform: mqtt
    name: "Lüftung Leistung"
    state_topic: "/SmartHome/SD_ventilator_Pwr/power"
    unit_of_measurement: "W"
  - platform: mqtt
    name: "Lüftung Verbrauch"
    state_topic: "/SmartHome/SD_ventilator_Pwr/energy"
    unit_of_measurement: "kWh"
    value_template: "{{value | float / 1000}}"

on the other hand lights defined via MQTT are working like “normal” entities. This is the definition in lights.yaml

  - platform: mqtt
    name: "Licht Aussen"
    # icon: mdi:lightbulb
    state_topic: "/SmartHome/licht_aussen/state"
    command_topic: "/SmartHome/licht_aussen/state/value"
    #availability_topic: "fhem/licht/aussen/available"
    payload_on: "on"
    payload_off: "off"
    # state_on: "on"
    # state_off: "off"
    optimistic: false
    qos: 0
    retain: true
    # value_template: >
      # {% if value == "on" or value == "off" %}
        # {{ value }} 
      # {% else %} 
        # {{ states('switch.licht_aussen') }} 
      # {% endif %}
  - platform: mqtt
    name: "Licht Terrasse"
    # icon: mdi:lightbulb
    state_topic: "/SmartHome/licht_terrasse/state"
    command_topic: "/SmartHome/licht_terrasse/state/value"
    #availability_topic: "fhem/licht/terrasse/available"
    payload_on: "on"
    payload_off: "off"
    # state_on: "on"
    # state_off: "off"
    optimistic: false
    qos: 0
    retain: true
    # value_template: >
      # {% if value == "on" or value == "off" %}
        # {{ value }} 
      # {% else %} 
        # {{ states('switch.licht_terrasse') }} 
      # {% endif %}
  - platform: mqtt
    name: "Küche"
    # icon: mdi:lightbulb
    state_topic: "/SmartHome/licht_kueche/state"
    command_topic: "/SmartHome/licht_kueche/state/value"
    #availability_topic: "fhem/licht/kueche/available"
    payload_on: "on"
    payload_off: "off"
    # state_on: "on"
    # state_off: "off"
    optimistic: false
    qos: 0
    retain: true
    # value_template: >
      # {% if value == "on" or value == "off" %}
        # {{ value }} 
      # {% else %} 
        # {{ states('switch.kuche') }} 
      # {% endif %}
2

It looks like the issue have been some comments between the sensor: and the definition of the sensors. And these comments made the definition not full available for HASSIO, or invalid or whatever.

sensor:
# Weather prediction
  # - platform: weather_data
  #   name: Wetter
  #   forecast: 24
  #   monitored_conditions:
  #     - temperature
  #     - symbol
  #     - precipitation
  #     - windSpeed
  #     - pressure
  #     - windDirection
  #     - humidity
  #     - fog
  #     - cloudiness
  #     - lowClouds
  #     - mediumClouds
  #     - highClouds
  #     - dewpointTemperature
  - platform: mqtt
    name: "Helligkeit Terrasse"
    state_topic: "/SmartHome/BewegungT/brightness"
    unit_of_measurement: "Licht"
  - platform: mqtt
    name: "Helligkeit Vorhof"
    state_topic: "/SmartHome/BewegungV/brightness"
    unit_of_measurement: "Licht"

When I wrote the feed here I moved the comment lines down, after this I restarted HASSIO and all sensors are now available in dropdown lists. So it was my error with wrong comments on the wrong place.

But I still don’t understand why the history was shown if the definition was not valid. Maybe somethine in the cache. And the comment has been there for a longer time but the history was shown anyway.