ComboBox change event fires twice on entering text and tabbing out

[IvanDanchev]

Bug report

Introduced in version 2018.2.620 (commit).

Reproduction of the problem

Dojo example.

1. Click the ComboBox input area.
2. Enter arbitrary text
3. Press "Tab" key.

Current behavior

The change event fires twice.

Expected/desired behavior

The change event fires once.

Environment

• Kendo UI version: 2018.2.620
• jQuery version: x.y
• Browser: [all ]

[Juveniel]

The issue can be reproduced on the following Dojo with the 2019 R1 (2019.1.115):
Case 1:

1. Type random text in the ComboBox input
2. Press Tab - change is fired once
3. Click on the ComboBox input and type more text
4. Press Tab - change is fired twice, instead of once

Case 2:

1. Type random text in the ComboBox input
2. Press Enter - change is fired once
3. Press Tab - change is not fired
4. Click on the ComboBox input and type more text
5. Press Enter - change is fired once
6. Press Tab - change is fired once, but it should not be fired at all