When I click the "publish" button on my Confluence page, I just get a spinner forever with a comment "We're still saving your page."

What do I do?
I can access the draft of the page, and I've tried creating other pages (just blank with a title) and have been able to publish them.
The page I'm publishing does have
* A header image
* A custom emoji
* Images with captions
* Enumerated list of steps to follow
(this is a process guide)