Hello!
you definitely want him to bring you the sheep when you back off. If he’s not, you need to evaluate why (is it his eye, the sheep youre using, are you stopping him too much, is it something youve done in his other training affecting this moment, etc. ) if you need help and want us to have a look at video of you working him, we do offer remote lessons, https://macraeway.com/online-lessons-with-your-dog/
Online Sheepdog Training