SAMD51 - Soft reset doesnt clear out pin usage state

[ladyada]

run this code

import board
from digitalio import DigitalInOut, Direction, Pull

led = DigitalInOut(board.D13)
led.direction = Direction.OUTPUT

while True:
    led.value = not led.value

then soft reset or save the file, you get a

main.py output:
Traceback (most recent call last):
File "main.py", line 4, in
ValueError: Pin PA21 in use