What to expect when performing fuel pressure check on a B6 A4 1.8t

I performed the fuel pressure test with a loaner tool from Autozone and it was brand new.

Here's a video:
https://youtu.be/w6WrN2V4das

So as you can see, the pressue is at 0 when the car is off. When the igintion is turned on, pressure shoots to 60psi for a couple of seconds (which means the fuel pump primed it), then starts falling quickly back to 0.
Once the engine is started, pressure is back to 60.
Once I shut the engine off, pressure drops back to 0 within a couple of seconds

Is this normal behavior for a B6 A4 1.8t? Or should the fuel rail hold ~60psi of pressure even after the engine is shut off?