Columns change width when bullet list is added

Summary

When the user adds a bullet list to the content in a column (using the Fabric Editor), the columns will auto re-size to a narrow setting.

Environment

Fabric Editor

Steps to reproduce

1. Create a new page in Fabric Editor
2. Add columns and set them to full width
3. In one of the columns add a bullet list

Expected Result

Bullet list is added and no changes to the page formatting (column width) are made.

Actual result

The columns will automatically re-size to the narrow default width

Workaround

Manually change the column width each time a bullet list is added to the content.