ComboBox: Text in ViewState not cleared on PostBack

[kevinoid]

The AJAX Control Toolkit 20.1.0

The installation method

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

Minimal steps to reproduce the bug

On a page with a ComboBox, perform the following steps:

1. Enter some text into the ComboBox.
2. Press Submit.
3. Remove the text from the ComboBox.
4. Press Submit.

Actual result

The text entered in step 1 reappears in the ComboBox.

Expected result

The ComboBox would remain clear, as a TextBox does.

Browser(s) used

• Edge 85.0.564.51
• Firefox 80.0.1
• Internet Explorer 11

A site deployment method

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

Sample project: https://gist.github.com/kevinoid/c33524d38084b9720adc7a6549219041

Thanks, Kevin