Preview is broken when Table, section and checkboxes are used

Issue Summary

Preview is broken when Tables, sections, and checkboxes are used.

Steps to Reproduce

1. Create a page with Section Macro
2. Insert bullets and then some content on the paragraph.
3. Insert the next bullet with table content.
4. Insert the next bullet instead of bullet please use the checkbox.
5. Create a new section and add Checkbox.
6. Observe the second section in the preview mode.

Expected Results

The checkbox appears when we preview the page with the content beside the checkbox

Actual Results

The content besides the checkbox is all overwritten with multiple checkboxes

The storage format of the page

storage format

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available. However, when you save the page, you see the content just fine.