This is a documentation bug in my opinion. The "via Example App" was never included, nor should it be.
A user is fully responsible for his or her content, it doesn't, and shouldn't, matter how that content was posted. Whether via: the web page, the Android App, a custom Stack App, or via Pony Express -- the content is what matters.
A rogue app would ...
This is probably a variation of this bug and a variation or repeat of this bug that was partially fixed (once upon a time).
Anyway, the timeline does show all your events as can be seen with this query:
where 1563667200 is midnight on July 21st, 2019.
The problem is that ...