Objects (like line shapes) disappear in Pages as soon as you move them
This is a new problem/bug that's just started in Pages. I've been using Pages for over 10 years as a page-layout tool and for mocking up images and text. But now if I draw a shape, like a line shape -- for example, let's say I create a callout line for an image -- and then I try to adjust the angle of the line or the length, and move the line around on the document, that line completely disappears. This is a new bug that's started in the past month or so. It's not limited to long documents. It's ANY document. This is so frustrating.
I'm using Pages 12.1.
MacBook Pro 13″, macOS 10.12