Two-way binding does not work when 'undo' plugin is removed

[kandonorbert]

Are you reporting a feature request or a bug?

Bug

Provide detailed reproduction steps (if any)

1. Remove the "undo" plugin from the standard-all preset (default) by using the [config] input
   { removePlugins: 'undo' };

Expected result

Two-way binding works properly

Actual result

The two-way binding does not work.
See: https://stackblitz.com/edit/ckeditor4-orm88s

If you comment out the
removePlugins: 'undo'
configuration, the two-way biding works as expected.

Other details

• Browser: Chrome
• OS: Win10
• Integration version: 1.0.0-beta.2
• CKEditor version: 4.12
• Installed CKEditor plugins: …

[f1ames]

I can confirm this issue based on sample provided. That's strange TBH 🤔 We need to investigate it.

Thanks for reporting 👍