Ionic Button, when disabled appears like it have two background colors in IOS

I am using ionic button with disabled property like this

<ion-button expand="full" type="submit" [disabled]="!loginForm.valid (click)="login()">Login</ion-button>

Here is how it looks when -
Form is Invalid

Form is valid
Screen Shot 2021-10-09 at 12.25.59 AM

On inspecting i found, it’s the COMPUTED padding-inline-start: 16px; and padding-inline-end: 16px; that is causing this kind of background;

How to remove that padding ?