core: ZHA Fan incorrect state on HA restart

Home Assistant release with the issue: 0.77

Last working Home Assistant release (if known): none

Operating environment (Hass.io/Docker/Windows/etc.): Ubuntu, Python 3.6 venv install

Component/platform: zha fan

Description of problem: When restarting Home Assistant, the state of all of my ZHA Zigbee fans shows as on regardless of if they are actually on or if they are actually off. My best guess is that it’s not correctly polling the state of the fans when the component loads. My Zigbee fans are all the King of Fans zigbee modules. Not completely positive if this is a ZHA component issue, or an upstream zigpy issue. @rcloran ?

Problem-relevant configuration.yaml entries and (fill out even if it seems unimportant):

zha:
  usb_path: /dev/zigbee
  database_path: /home/hass/zigbee.db

Traceback (if applicable):

None

Additional information: N/A