B7 Alltrack Loss of Power

[MIG]

I never had a power loss on mine;
What your describing might be the brake or neutral lockout, a safety feature many automakers implemented after all those floor mats and unexpected accelerations.

If the car thinks the brake pedal is pressed, the accelerator will do nothing until released. If it's doing it once a year, it will be tough to track down; if no error codes are being logged, a live data trace while the issue occurs would be a way of confirming it.