HTMLEditorExtender - Characters are not properly escaped

[mmarjano]

The AJAX Control Toolkit v20.1.0

The installation method

• [ ] Installer
• [X] NuGet package
• [ ] A custom build from the source code

Minimal steps to reproduce the bug

• Add the HTMLEditorExtender control to the page and run the web app
• type in: Some text <i>this should not be italic</i>
• post to the server
• problem is also reproduceable on the HTMLEditorExtender demo site
• demo recording: here

Actual result

• Value received in the codebehind is: Some text <i>this should not be italic</i>
• If page is then re-rendered, value in the HTMLEditorExtender control is not the same as before postback, and now reads: Some text this should not be italic

Expected result

• Value received in the codebehind should be: Some text &lt;i&gt;this should not be italic&lt;/i&gt;
• If page is then re-rendered, value in the HTMLEditorExtender control should be the same as before postback, and should read: Some text <i>this should not be italic</i>

Browser(s) used

Google Chrome 89.0.4389.128

A site deployment method

• [X] VS development web-server,
• [X] IIS