hello and welcome,
issue: when I open my calendar and add others I only see the first 25 items, if I add an 26th or 27th person, those entries aren’t visible, but they appear as soon as I delete an existing one. It seems there is no way to scroll down, nor to expand the view.
http://www.bilder-speicher.de/10101817360887.gratis-foto-hosting-page.html
Its Reproducible on other 8.5.1. fp3 Win XP Machines