The spinner doesn't show When i set the disabled property of the button to this.form.invalid

[walexy249]

Bug Report or Feature Request (mark with an x)

- [ x] bug report -> please search issues before submitting
- [ ] feature request

OS and Version?

Ubuntu 20.0

Versions

Angular CLI: 12.2.4
Node: 14.15.5
Package Manager: npm 6.14.11
OS: linux x64

Angular: undefined
...

Package Version

@angular-devkit/architect 0.1202.4 (cli-only)
@angular-devkit/core 12.2.4 (cli-only)
@angular-devkit/schematics 12.2.4 (cli-only)
@schematics/angular 12.2.4 (cli-only)
typescript 3.2.2

Repro steps

whenever i set the disabled property of the mat-spinner-button to form.valid, the loading spinner doesn't show anymore.

<mat-spinner-button [options]="spinnerButtonOptions" [disabled]="form.invalid" > </mat-spinner-button>