Button css does not work on ios devices. Bad appears

How should I edit the button css?
It looks fine in the mobile version in the browser. On mobile devices but the image is distorted

Browser view

iPhone view

please share some code it is hard to tell what is wrong here

<ion-button color="danger" expand="block" type="submit"
                            [disabled]="!loginForm.form.valid">{{'login' | translate}}

with this code i am not able to reproduce at my end.

I haven’t added any css code. I added it the way it is on the site

The error is caused by typing type = “submit”. It was alright when I removed it