That is correct.
I have attached the file here. The issue which I mentioned appears on the "Logged In" page.
-- attachment removed --
Literally two minutes ago I made a discovery which may give you more clues as to what is happening. I chose to publish to the Axure Share project, leaving out the "Login Page" which has the text fields to enter email and password. In other words, I uploaded a project containing only the page titled "Logged In" to Axure Share. In this version, the keyboard issue does not show up on the iPhone.
Once I reintroduced the "Login Page" and clicked through the mockup, entering email + password and then logging in, then the issue appears. When touching any part of the "Logged In" page, the iOS keyboard shows up.
So it would seem (?) that it has something to do with the text inputs on the Login Page somehow "carrying over" in the iOS Axure Share app to the next page?