Balena Perpetually on "Starting"

I have sucessfully flashed micro-SD cards with Balena in the past, but lately once all the parameters are chosen and Start Flash is selected, the progress indicator never moves off of “Starting.” It stays in an endless loop without ever starting the operation.

This is with a new, out of the box micro-SD

can you reproduce this with multiple SD cards?
Did you recently update your OS or drivers?