webkit box orient styling disappears from styling

Wrapping -webkit-box-orient in the following autoprefixer code seems to solve the issue.

.ellipsis {
    display: block;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-box-orient: vertical;
    /* autoprefixer: off */
}