Hi @michael.britton ,
Someone else recently posted about a similar issue. They reported that they solved the issue. I asked them what their solution was.
Check out the thread here: Pushed the new slices 'successfully,' but not showing up in page builder - Developing with Prismic - Prismic People
Is there any chance their "solution" could help you too?
I can't say that Prismic is 100% flawless. I have yet to find a CMS I like better, though. If, after looking at the thread linked above, you're still struggling and you're using Next, I can try to help.