I also don't recommend feeding while they are on any stage of shed.
not only do you face regurge issues, by not feeding while the snake is in shed it Aldo gives their.digestive systems time to recoup.
wild snakes will go weeks searching for prey, this gives them time to allow their stomachs time to relax, no snake in the wild Is finding they perfect prey item every week, but in captivity your in control of what does and doesn't go into your snake.
hope this helps!