Flex, AngularJS + Masonry, akoenig/angular-deckgrid and more [duplicate]

Answer 1

Actually, I am gonna go out on a limb and say that flex-wrap: wrap will fix the issue.

.holder {
flex-wrap: wrap
-moz-columns: 2 auto;
box-sizing: border-box;
display: flex;
padding: 0 40px;
width: 100%;
}