Yeah it's sort of like a bookmark, but it acts like a separate app.
You will need a host like dropbox for regular use, but it should update as you change anything.
Its great for preview though.
You can do something similar with Android, and Windows 10 universal apps.
Anyway if you can replicate the bug easily you should make a report.
You never know there might be some setting he can change, or at least submit a bug report to Apple.