Weird readings max31855

ESPHome
,
1

I connected a K-Type Thermocouple to the max31855.

relevant part of the script:

sensor:
  - platform: max31855
    id: temp_id
    # FSPICS2
    cs_pin: GPIO18
    update_interval: never
  - platform: internal_temperature
    id: internal_temp_id
    update_interval: never

script:
  ...
      # read sensor
      - component.update: temp_id
      - component.update: internal_temp_id
      - delay: 250ms
      - component.update: temp_id
      - delay: 250ms
      # update display
      - component.update: display_id

Relevant log

[20:28:15.554][D][sensor:129]: 'internal_temp_id' >> 21.7 °C
[20:28:15.758][D][max31855:100]: Got thermocouple temperature: 42.00°C
[20:28:15.758][D][sensor:129]: 'temp_id' >> 42.0 °C
[20:28:15.987][D][max31855:100]: Got thermocouple temperature: 21.00°C
[20:28:15.988][D][sensor:129]: 'temp_id' >> 21.0 °C

I am writing the temperature to a display and it shows the correct reading.
Updating the temperature sensor only once results in very weird readings. The second reading is correct.
Is this expected?

2

And what you get if you remove the script and give the sensor few seconds update interval?