Bizarre lovelace display

Can anyone suggest what is going on… Entity shows a value of ‘shoulder’ and the history graph of the same entity shows a value of ‘offpeak’.

The true answer is ‘shoulder’ and has been so since 07:00 this morning.

Lovelace yaml below…

      - type: entities
        entities:
          - entity: sensor.energy_tariff
      - type: history-graph
        entities:
          - entity: sensor.energy_tariff

tariff weirdo