Internet Explorer drops changes made to numbered lists with Italic text

Summary

Internet Explorer drops changes made to numbered lists with Italic

Environment

• Internet Explorer 11

Steps to Reproduce

1. Create a new page
2. Create a numbered list
3. Set all text to Italic
4. Create two or more numbered entries
5. Save the page
6. Edit the page
7. Place cursor before the first word in the first numbered line and turn of Italic
8. Type in new text and hit enter to create new numbered line before all others
9. Save the page

Expected Results

The page is saved

Actual Results

Newly added text after the second edit disappears, leaving only original numbered lines with the first word of the first line being Normal
See a video showing the problem:
Text dissapears switching italics.mp4

Workaround

The issue is not observed on Chrome
The issue is not observed on Firefox