Addon-docs: no binding updates on angular

[negue]

Describe the bug
When you change the control values on the Docs-Tab, nothing is changing on the story-component.

BUT

Those changes are applied on the Canvas-Tab.

To Reproduce
Steps to reproduce the behavior:

1. Create a fresh angular app with ng new app-name
2. cd app-name
3. npx sb init
4. npm run storybook
5. Select Button click on Docs at the top
6. Change any of the values like backgroundColor or label

Expected behavior

The changed values in the controls are updated on the Docs-Tab's component.

Screenshots
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Code snippets
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System:
Environment Info:

System:
OS: macOS 10.15.4
CPU: (4) x64 Intel(R) Core(TM) i7-5650U CPU @ 2.20GHz
Binaries:
Node: 12.13.1 - /usr/local/bin/node
Yarn: 1.17.3 - /usr/local/bin/yarn
npm: 6.12.1 - /usr/local/bin/npm
npmPackages:
@storybook/addon-actions: ^6.0.10 => 6.0.10
@storybook/addon-essentials: ^6.0.10 => 6.0.10
@storybook/addon-links: ^6.0.10 => 6.0.10
@storybook/angular: ^6.0.10 => 6.0.10

Additional context

Tried it on Vivaldi, Chrome & Firefox, same issue on all browsers.

I didn't find any other opened issues for this.

[shilman]

Closing as dupe to #11908