Reactive Form Array Object updated but Virtual Scroll list not updating

[Abul4u]

Reproduction

https://stackblitz.com/edit/angular-rf-virtual-scroll

Expected Behavior

Data should append in Virtual Scroll list.

Actual Behavior

=> Virtual Scroll list not updating
=> Reactive Form Array Object updated perfectly

Environment

• Angular: 7
• CDK/Material: 7
• Browser(s): All
• Operating System (e.g. Windows, macOS, Ubuntu): Windows

[Abul4u]

Solved:
in addOneNew function
added: this.items.controls = [...this.items.controls]
and its working

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