.montage-ImageGallery {
    position: relative;
    min-width: 1px;
    min-height: 1px;
}

.montage-ImageGallery-flow .montage-Flow-Repetition > div {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    width: auto;
    height: auto;
}