Help, Toggle Full Screen, Cancel, and Done buttons are not visible in my custom dialog
I am seeing a weird behavior that I'm unable to debug in one of my custom components. The buttons that usually appear along the top of the dialog are all "hidden".

This is actually only happening to one component that I'm aware of, and only in staging and production, I cannot reproduce on my local dev environment.
It doesn't appear to be an error either, inspecting the source of the page reveals the following:
<div handle="headerContent" class=" coral3-Dialog-title coral-Heading coral-Heading--2" role="heading" aria-level="2" hidden>
So it looks like something is causing these controls to be hidden...no idea what though.
Anyone else ever run into anything like this and maybe know any threads I can tug at to try to unravel this mystery?