Office Writer enters by itself when I push enter once

When I was editing a file labeled as a .doc, I would push enter only once and the cursor would continue down several pages long, pushing other text down. It was really frustrating. I just recently updated my Ubuntu to the most recent version. Do I need to update Office Writer as well or is there another reason for the glitches?

Does it only happen in this document or some where else? Looks to me like a sticky enter key on your keyboard.

It’s happened with several other documents. But it only happens in Libre office writer, not when I am typing on the internet.