I opened my Scrivener today after a few weeks on holiday — and all the styles had changed! There was no Body Style, no Hanging indent Style; but there were Attribution and Verse styles. And…when I selected a paragraph and marked it as default style; my bulleted list paras didn’t revert to the font I was using (Palatino 12).
On your profile you specify being a mobile-only user. If so, how are you making styles like this? You would have whatever styles the desktop version creates, available to each individual project, but if you create a new project or switch to one made on iOS, it will just have the stock example styles (Attribution and Verse would be included among these, so that’s a bit of a tell).