Why Does Bootstrap Grid Improperly Stack These Elements?

The third element in my grid is not breaking to the left side, instead it is breaking to the right. I believe this is because the columns are not the same height. I cannot simply a

Solution 1:

Have you tried applying a .clearfix every 2 col-sm-6 (full 12 columns row) elements:

<div class="col-md-3 col-sm-6" style="background-color: red;">
    <div class="feature-box">
        <div class="feature-item"></div>
        <p class="sub-title">Better Customer Relationships</p>
        <p class="text">Personalized emails connect you with your customers.</p>
    </div>
</div>
<div class="col-md-3 col-sm-6" style="background-color: red;">
    <div class="feature-box">
        <div class="feature-item"></div>
        <p class="sub-title">Set it and Forget It</p>
        <p class="text">Set up a Jaynote campaign once, and automatically engage with every customer.</p>
    </div>
</div>
<!-- apply clearfix -->
<div class="clearfix"></div>