Issue #3211808 by iamdroid: Does not work with multiple submit buttons on a form.

<button{{ button_attributes.addClass(button_classes) }}>

  <div class="mdc-button__ripple"></div>

  <span class="mdc-button__label">{{ attributes.value|render }}</span>

  <input{{ attributes|without('class').addClass('button-submit__input', 'visually-hidden') }} />

  <input{{ attributes|without('class').addClass('button-submit__input') }} />

</button>