I hope someone can explain what Word (365 Apps for Enterprise) is doing.

This morning I noticed that Word's display seemed to be flickering. I realized that it was displaying a sort of shadow cursor: a vertical bar that tracks the mouse pointer when it's over text. When the pointer is to the left of the text the bar rests at the start of the line it's next to; when it's to the right of the text the bar rests at the end of the line.

Later I noticed that Word's status bar had changed. It used to display useful information about the document in the center: current page, number of pages, column position of the insert point, and so on. Now all of that is gone. At the left end of the status bar Word displays various meaningless messages, most often "Move to where?"

I Googled "Move to where" and found that it's a message that Word displays if I move a block of text by this method:

1. Select the text.
2. Press F2. "Move to where?" appears.
3. Place the the insert point where the text is to go.
4. Press Enter.

That is not what is happening here. When I position the insert point and press Enter, Word simply inserts a paragraph end. And the shadow cursor is still there.

What has gotten into Word, and how can I snap it back to normal?