Really it depends on the individual snake.
But, yes.
Consider it from the animals perspective if you will. They can be grumpy at shed time to start with then, their eyes get cloudy so they can only identify threats by other senses like vibration, scent and heat. I figure if you are going to get a bite that isn't a mistaken feeding response and your animal is normally content and healthy that is a likely time.
That isn't to say there aren't many that can be handled at that time with no attempts to bite.