Two things malfunctioned with my Skoda Octavia windows
One window won't operate with the 'one-touch' switch, only by holding the switch
The 'convenience' window operation from the key fob stopped working
I tried the following
Using the other key fob
Replacing the key fob battery
Resetting the window options to 'factory settings' and set it up again
Replacing the four-window switch unit in the driver's door
but nothing worked.
I discovered that the problem was caused by the window controller's "Force Limiter", which had disabled the normal window operation. It can be reset by
Opening the defective window
Closing that window
Releasing the button
Holding the button in the 'close' position for several seconds.
This fixed the problem and normal window operation was restored.
It is possibly the same for other VAG based cars such as VW, Audi and Seat.