Comments on a knowledge article are not viewable after attaching a .png file to the article.
Steps to Reproduce
1. Open a knowledge article.
2. Add a number of comments.
3. Add a .png file as an attachment.
Observe some of the existing comments are not visible.
This issue has been fixed. If you are able to upgrade, review the Fixed In or Intended Fix Version fields to determine whether any versions have a planned or permanent fix.
Related Problem: PRB1099808