ngClass behavior change after latest nightly

[naveedahmed1]

With latest release the below code is working perfectly:

<button mat-raised-button color="primary" type="submit" [ngClass]="{'btn-xs':formButtonXs}">Save</button>

But with latest nightly build, it no longer seems to work.

When value of formButtonXs is true the button has below classes:

mat-primary btn-xs

When value of formButtonXs is false the button has just below class:

mat-primary

Expected behavior

It should have mat-raised-button mat-primary when formButtonXs is false whereas, mat-raised-button mat-primary btn-xs when formButtonXs is true

[robisim74]

Same problem here. Using ngClass, all material classes are removed.

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