It looks like you added some custom code to the sidebar widget area which is what caused the issue. You increased the width to 340px which seems to be the problem. If you notice the widgets are cutoff when it exceeds that area. Try decreasing the width to 330px or so and you’ll see it show up correctly –
.sidebar .widget {
border-bottom: 1px solid #ccc;
margin-bottom: 2rem;
margin-right: 17px;
overflow: hidden;
padding-bottom: 2rem;
width: 340px;
}
should be around line 2155