Help with Preview Mode and Next.js, issue with previewing draft changes from already published doc

Hoping for some help with Preview Mode and Next.js — I have it working, and with draft documents showing up, etc— but when I go to preview draft changes from an already published doc nothing happens and I just get the last published version. Any ideas?

— i know I've bugged you about this before, but just wondering if you had any thoughts here.
In other words: If doc is unpublished and a draft, preview works — but if doc is published and we change X from Foo → Bar … can't see that. Wonder if you know why that would be? Is this something I need to change in my queries?

NEVERMIND — FIGURED IT OUT! HALLELUJAH