A quick sanity check for Pi Particle code

Hi,

I have flashed and run the blink-an-led example provided at build.particle.io successfully on a Rasbperry Pi 3 B, but it’s raised some questions.

The onboard LED (D7) blinks as expected, but an LED wired to D0 blinks only once (or twice) and then does not continue to blink.
If I change the pin definition to D1 and wire the LED accordingly, then the LED blinks successfully.

Why?

This is using a fresh-from-the-box Pi so I’m certain I haven’t cooked any of the GPIO.

Of course, I’m referring to the Particle mapped IO below

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