Single column page layout truncates left side of PDF export

Summary

When Single Column Page Layout has been applied to a page, exporting the page to PDF cuts off the left-hand side of the page.

Environment

• Confluence Cloud

Steps to Reproduce

1. Create a new Confluence page.
2. Select Page Layout and Single Column Layout:
   
3. Add your text into the layout cell.
4. Publish the page.
5. Click . . . > Export to PDF

Expected Results

• The PDF file generated is normal and all text is legible.

Actual Results

• The PDF file generated is truncated on the left.
  

Workaround

• Use another page layout instead, such as Full Width, or two or 3 columns.
• Another option is to instead insert a single table cell, center this on the page, and set to Fixed Width rather than Responsive. This will have a similar appearance. The downside of this is if there is already a table that should go into this layout, it won't work since nested tables are currently unsupported in Cloud: CONFCLOUD-58656