.building-block-iframe {
  position: absolute; /* To fix iframe's hight in Edge */
  left: 0;
  top: 0;
  display: block;
  width: 100%;
  min-height: 100%; /* To fix iframe's hight in Edge */
}

.building-block-iframe-wrapper {
  position: relative; /* To fix iframe's hight in Edge */
  min-height: 480px;
}

.building-block-iframe {
  position: absolute; /* To fix iframe's hight in Edge */
  left: 0;
  top: 0;
  display: block;
  width: 100%;
  min-height: 100%; /* To fix iframe's hight in Edge */
}

.building-block-iframe-wrapper {
  position: relative; /* To fix iframe's hight in Edge */
  min-height: 480px;

  /* To fix iframe scrolling on ios */
  -webkit-overflow-scrolling: touch;
  overflow-y: scroll;
}

Fix scrolling of iframe for ios
Fix scrolling of iframe for ios
