Pasting a table from Excel or rich contents from Word inserts an extra image attachment on page

Issue Summary

This is reproducible on Data Center: Yes

Copying table data from excel inserts a image in Confluence and adds it as an attachment

Steps to Reproduce

case 1

1. Create a page in Confluence.
2. Copy table data from excel and paste on the page.
3. Replication video
   1. It shows how the behaviour was working fine in 7.13.2 and now is different in 7.17.1
   2. Recording #13.mp4

case 2

1. Create a page in Confluence
2. Copy a paragraph containing both text and image from Office Word
3. Paste it into editor

Expected Results

Table data from excel should get copied in the confluence table

Actual Results

Table data from excel is being copied, however the excel data image is also added on the table and also in the attachment

Workaround

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

Note

Copy the table data from Word can cause the issue as well.

Sample file

source.xlsx