When adding image to TinyMCE, trimmed teaser content breaks before image

When I added a new page (and tried with a story too) using the TinyMCE Editor, I selected to insert an image into the editor. There was text above and below the image. I wanted the entire content to display in the trimmed/teaser block, so I didn't insert any

tags. When I previewed or submitted the content, the teaser content only included text up to the image. If I clicked "read more" I could see the full page including the image. To get around this, I included the

tag at the very end of the text (so a couple lines after the image) and the full content shows in the teaser.