In the spirit of this forum, I reserve the right to change my mind.
I can now confirm that this will not happen. I was debating canceling my Ulysses subscription, which expires in October. But I have decided to cancel my Ulysses subscription.
As I’ve shared, there is much I like about Ulysses, and though I’d lost work when using a Beta version, I chalked it up as a fluke. No longer. Today, I entered text in Ulysses on my Mac. It synced to my iPad but would not sync to the iPhone. I deactivated and reactivated Ulysses iCloud sync on my devices. It still would not sync. I rebooted my iPhone, but nothing.
I can’t trust Ulysses. From reading other reports of this issue, the problem seems to be an iCloud issue with Ulysses sync. But that doesn’t solve anything. My work in Pages, iA Writer, and Scrivener (Dropbox) sync perfectly without delays or missing text. Ulysses’ unreliable iCloud syncing put a nail in the coffin for considering Ulysses for my work. RIP Ulysses. 
And, I can finally “RIP” regarding my writing apps. 
- Pages for my professional documents.
- IA Writer for my blog
- Scrivener for the book project.
See, that wasn’t so hard! 