cannot use usb stdio and usb host (pio) at same time

[shuffle2]

https://forums.raspberrypi.com/viewtopic.php?t=355601

I seem to have run into the same issue as the above thread.

While there's nothing stopping this configuration from working with a little manual jiggling of things, it should work out of the box with the sdk, and it's confusing that it does not.