Contents of Confluence macros overlap in View Source

Issue Summary

Several Confluence macros like Info, Panel, Tip, Warning, Code block and Excerpt macros overlap with the macro’s title while opening as 'View Source'

This is reproducible on Data Center: yes

Steps to Reproduce

1. Install and setup Confluence (8.5.2 used here)
2. Create a new page and add Info macro
3. Give sample content in the Info macro and Save the page
4. Click ellipsis(3 dots on right top corner)
5. Click on View Source

Expected Results

Info macro and its contents should be displayed properly in View Source

Actual Results

The contents overlap with the Info as shown in below screenshot:

Original page for reference:

Workaround

Currently there is no known workaround for this behaviour. A workaround will be added here when available