Fetching page via REST API does not include closing tag (</img>)

Issue Summary

What the customer is doing is using GET to fetch information from a source page and POST to create a new target page(copy source page to target page). There is an image in source page.

GET /rest/api/content/11111111?spaceKey=TEST&expand=body.view

There is no closing tag(</img>) for image return, the part is as below:

The problem is if using the above information (fetching from GET API) to create target page(without </img>), an error occurred.

POST /rest/api/content/

{"statusCode":400,"data":{"authorized":false,"valid":true,"allowedInReadOnlyMode":true,"errors":[],"successful":false},"message":"Error parsing xhtml: Unexpected close tag </span>; expected </img>.\n at [row,col {unknown-source}]: [1,1084]","reason":"Bad Request"}%

 Also, if appending </img>, the page will be created without error.

This is reproducible on Data Center: (yes) / (no)

Steps to Reproduce

1. Create a page, attach a image(search.png).
2. Using get for API (/rest/api/content) to fetch the page created.
3. Copy the part of image into a file( data.json), and using this file to create new page.
4. Run POST REST API to create page

   curl  -u admin:abc -X POST -H 'Content-Type: application/json'  -d '@data.json'  "http://myconfluence:8090/rest/api/content"
   

Expected Results

The page will be created.

Actual Results

The page cannot be created.
Below error will be returned.

{"statusCode":400,"data":{"authorized":false,"valid":true,"allowedInReadOnlyMode":true,"errors":[],"successful":false},"message":"Error parsing xhtml: Unexpected close tag </span>; expected </img>.\n at [row,col {unknown-source}]: [1,1084]","reason":"Bad Request"}%

Workaround

Adding close tag( </img> ) into data.json