Unable to paste text copied across two or more lines from a table AND present inside an Excerpt macro

Issue Summary

On a page, if you copy a text set out in two or more lines from a table and the latter is inside an Excerpt macro (or a Scroll Title macro, from vendor K15t), trying to paste it into another table cell doesn't work. 

Steps to Reproduce

1. Edit a Confluence's page
2. Add an Excerpt macro (or a Scroll Title macro), then a table inside it
3. In one of the table cells, insert text laid out in two or more rows
4. Copy that text
5. Paste the text into another table cell

Expected Results

The text is pasted successfully.

Actual Results

The text is not pasted.

Workaround

• List the lines as bullet/numbered lists
• Move the text to be copied so that it is on a single line
• Or copy & paste one line at a time