Currently, there is a bug with the Smarter TVs (KALED32QH7000SKA, KALED40QF7000SKA) where when you turn off the TV it goes into standby. During this time the internet connection drops out and does not automatically reconnect when the TV is turned back on.
To work around this issue the TV can be set to shutdown instead of going into standby when pressing the power button. To activate this setting follow the instructions below:
When the TV source is currently on 'Live TV', press the 'MENU' button on your remote.
In the index menu scroll to 'More'.
Select 'TV Setting'
Scroll down and turn off the two settings 'Auto Standby' and 'Fast Boot'
Now when you press the power button on the remote the TV will prompt you to shutdown. Select 'OK' when this prompt occurs.
When the TV is turned back on it will reboot its software and automatically connect to the WiFi.