Page Resizing Issue in Morpheus when using 2 column setup with Checklist

I'm seeing issues with Resizing in Lessons when using a two column setup with a checklist.

Steps to reproduce:

1. Create a site and add the lessons tool
2. Select Add Content > Add Text and add some example text
3. Click the Book / Page icon in the top left of text section
4. Click the box next to "Two columns inside this one, text flows between them"
5. Click the + icon on the left column and select add Checklist
6. Add a new checklist and save
7. Now resize the page

Expected result:
The Lessons body should resize and no scrollbar should be needed

Actual Result:
Resizing to a smaller browser window starts to present a scrollbar and the lessons body goes beyond the screen. (2column.png)

If you separate the columns into their own sections, this issue does not occur. (separateSections.png)