bootstrap gridにて英数字がうまく表示されない場合の対策は別途CSSにてclassを下記の様に作成し対応。
<style>
.custom-break {
overflow-wrap: break-word;
word-wrap: break-word; /* 古いブラウザとの互換性のため */
}
</style>
<div class="row">
<div class="col-sm-3">aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div>
<div class="col-sm-3">col2</div>
<div class="col-sm-3">col3</div>
<div class="col-sm-3">col4</div>
</div>
対策後
<div class="row">
<div class="col-sm-3 custom-break">aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</div>
<div class="col-sm-3 custom-break">col2</div>
<div class="col-sm-3 custom-break">col3</div>
<div class="col-sm-3 custom-break">col4</div>
</div>