Angular - view not updated after first ngOnChanges call with initial inputs

[Quetute]

Describe the bug

Our Angular component expects that ngOnChanges is called at initialization time and the view is correctly updated according to the initial input.
The actual behavior is that while ngOnChanges is called, the view is not updated.

From Angular documentation:

[ngOnChanges] Called before ngOnInit() (if the component has bound inputs) and whenever one or more data-bound input properties change.

Our component rely on this behavior to not have to execute the same code twice in ngOnInit and ngOnChanges.

To Reproduce
https://github.com/Quetute/storybook-angular-initial-input-issue

System

Environment Info:

System:
OS: macOS 11.6
CPU: (4) x64 Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz
Binaries:
Node: 16.13.0 - /usr/local/bin/node
Yarn: 3.1.1 - /usr/local/bin/yarn
npm: 8.1.4 - /usr/local/bin/npm
Browsers:
Chrome: 97.0.4692.99
Firefox: 95.0.2
Safari: 14.1.2
npmPackages:
@storybook/addon-actions: ^6.5.0-alpha.23 => 6.5.0-alpha.23
@storybook/addon-docs: ^6.5.0-alpha.23 => 6.5.0-alpha.23
@storybook/addon-essentials: ^6.5.0-alpha.23 => 6.5.0-alpha.23
@storybook/addon-links: ^6.5.0-alpha.23 => 6.5.0-alpha.23
@storybook/angular: ^6.5.0-alpha.23 => 6.5.0-alpha.23
@storybook/builder-webpack5: ^6.5.0-alpha.23 => 6.5.0-alpha.23
@storybook/manager-webpack5: ^6.5.0-alpha.23 => 6.5.0-alpha.23

Additional context

As a workaround, we could copy the logic in the ngOnInit hook and add a check in ngOnChanges that rely on the SimpleChange.isFirstChange() method.

[alc-1]

Had the same issue, but it's actually resolved since version 6.3.16 (#17156).

Since you'r on the alpha version, I guess there's some merging required to make this fix available.. I'm not aware of how it works, but I guess you'll soon get a new version that comes with it. 😄

[rdebeasi]

I can reproduce this issue on the latest stable version of Storybook. (I'm using Storybook 6.4.19 with Angular 12.1.0).

I've forked @Quetute's demo and updated it to the latest stable version of Storybook, and I can reproduce the issue there as well. Possibly related: #17492

[shilman]

We’re cleaning house! Storybook has changed a lot since this issue was created and we don’t know if it’s still valid. Please open a new issue referencing this one if:

• this is still a problem in SB 7.x
• you can provide a consistent reproduction in 7.x (at https://storybook.new/ or per repro docs).