Found a pretty obnoxious bug related to editing posts.
When I re-wrote the post form component, I changed the way the form data was built up. Long story short, there was a spread operation that was formerly sufficient to copy the form data to the preview object. After making the formdata a bit more complex, it was only doing a shallow copy after the re-write. Caused all kinds of havok when you previewed your edits by applying the preview data to the post object in the DOM (because of the partial shallow copy) which was then picked up by the snapshot feature and required you to manually refresh the data. Ugh. Anyway, that's fixed.
Have fixed that and also merged in the refactor of most of the embed components as well.
Beta 2 is now live with these fixes.