I upgraded to 3.0 this morning and discovered that the "MED" button seems to be triggering the "HIGH" button when the fan is in LOW or OFF mode, or does nothing when the fan is HIGH.
entity: fan.proxy_office_fan
type: custom:fan-mode-button-row
name: Office Fan
customTheme: false
I upgraded to 3.0 this morning and discovered that the "MED" button seems to be triggering the "HIGH" button when the fan is in LOW or OFF mode, or does nothing when the fan is HIGH.