A family of Microsoft word processing software products for creating web, email, and print documents.
I don't know if it only happens with one of those views. I only work in 'Simple Markup' and rarely work in 'All Markup' (it's much too cluttered to work in).
Side-note: Personally I always make use of All Markup view, because it gives me full control over the display of tracked changes. The view is fully customizable via the Advanced Track Changes Options dialog box. :-)