mine does this daily mate its a royal ball ache
seat was "unable to reproduce" the issue when they changed my master cylinder yet when i drove home from the deal it done it...
i have got used to it now :( will most likely put up with it till i fit a new uprated clutch.
my adui tech mate said its the pressure plate not springing back once its been depressed but i dont think thats accurate as the pedal goes all soft before i put my foot down.
o well, just another week vag part to add to the list