"Update for sensor.asuswrt_download_speed fails" after upgrade to 0.107.1

[scaarup]

The problem

My Asus WRT integration is broken after latest update.

Environment

• Home Assistant release with the issue: 0.107.1
• Last working Home Assistant release (if known): 0.106
• Operating environment (Hass.io/Docker/Windows/etc.): Hass.io
• Integration causing this issue: asuswrt
• Link to integration documentation on our website: https://www.home-assistant.io/integrations/asuswrt/

Problem-relevant configuration.yaml

  host: 192.168.49.9
  username: admin
  password: XXX
  sensors:
    - upload_speed
    - download_speed

Traceback/Error logs

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 279, in async_update_ha_state
    await self.async_device_update()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 474, in async_device_update
    await self.async_update()
  File "/usr/src/homeassistant/homeassistant/components/asuswrt/sensor.py", line 74, in async_update
    await super().async_update()
  File "/usr/src/homeassistant/homeassistant/components/asuswrt/sensor.py", line 57, in async_update
    self._rates = await self._api.async_get_bytes_total()
  File "/usr/local/lib/python3.7/site-packages/aioasuswrt/asuswrt.py", line 325, in async_get_bytes_total
    rx = await self.async_get_rx()
  File "/usr/local/lib/python3.7/site-packages/aioasuswrt/asuswrt.py", line 332, in async_get_rx
    return int(data[0])
ValueError: invalid literal for int() with base 10: ''

Additional information

[frenck]

Duplicate of #32940