ngOnChanges Hook not triggered in angular 9

🐞 Bug report

Command (mark with an x)

• new
• build
• [ x ] serve
• test
• e2e
• generate
• add
• update
• lint
• xi18n
• run
• config
• help
• version
• doc

Is this a regression?

Yes, it is working fine angular 7, but issue in angular 9.

Description

While dynamically changing the property, ngOnChanges hook not triggered in angular 9 but it properly triggered in angular 7.

Angular 7:

Please refer the below image, here we have used button name hidden click to changes the property.

In angular 7 the ngOnChanges hook are triggered properly from angular core level and I am getting changes from the changes parameter.

Angular 9:

Same as angular 9, ngOnChanges hook not triggered, at the time of property changes,

🔬 Minimal Reproduction

Angular 7 sample: https://github.com/kumaresan-subramani/Angular_diagram_7 Angular 9 sample: https://github.com/kumaresan-subramani/Angular_diagram_9

Steps to reproduce issue

• npm i
• ng serve

Then click button hidden to change the property, then you can reproduce the issue.

🔥 Exception or Error

No

🌍 Your Environment

Angular CLI: 7.3.10
Node: 10.15.1
OS: win32 x64
Angular: 7.2.16
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.13.10
@angular-devkit/build-angular     0.13.10
@angular-devkit/build-optimizer   0.13.10
@angular-devkit/build-webpack     0.13.10
@angular-devkit/core              7.3.10
@angular-devkit/schematics        7.3.10
@angular/cli                      7.3.10
@ngtools/webpack                  7.3.10
@schematics/angular               7.3.10
@schematics/update                0.13.10
rxjs                              6.3.3
typescript                        3.2.4
webpack                           4.29.0

Angular CLI: 9.1.11
Node: 10.15.1
OS: win32 x64

Angular: 9.1.12
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Ivy Workspace: Yes

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.901.11
@angular-devkit/build-angular     0.901.11
@angular-devkit/build-optimizer   0.901.11
@angular-devkit/build-webpack     0.901.11
@angular-devkit/core              9.1.11
@angular-devkit/schematics        9.1.11
@angular/cli                      9.1.11
@ngtools/webpack                  9.1.11
@schematics/angular               9.1.11
@schematics/update                0.901.11
rxjs                              6.5.5
typescript                        3.8.3
webpack                           4.42.0

[alan-agius4]

Transferring to the framework repo for a better triage.

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