Extra template field not showing in moderated comments

In my template, I have a select field that lets a user choose a star rating for a product. It works fine when bypassing moderation with a Perch admin login, but when another user submits the form and the comment is listed on the site, it strips the content from within that field. Is there another place I need to register this additional field within the plugin so the system doesn't kill it on upload?

Comments Form:

<perch:form id="comment" method="post" app="perch_comments">
    <fieldset>
        <h3>Write a Review</h3>
        <div>
            <perch:label for="commentName">Name</perch:label>
            <perch:input type="text" id="commentName" required="true" label="Name" antispam="name" />
            <perch:error for="commentName" type="required">Required</perch:error>
        </div>
        <div>
            <perch:label for="commentEmail">Email</perch:label>
            <perch:input type="email" id="commentEmail" required="true" label="Email" antispam="email" />
            <perch:error for="commentEmail" type="required">Required</perch:error>
            <perch:error for="commentEmail" type="format">Check format of address</perch:error>
        </div>
        <div style="margin-top: 20px">
            <perch:label for="rating">Rating</perch:label>
            <perch:input type="select" id="rating" options="★ ★ ★ ★ ★|5, ★ ★ ★ ★|4, ★ ★ ★|3, ★ ★|2, ★|1" allowempty="false" required="true" class="rating-select" />
            <perch:error for="rating" type="required">Required</perch:error><br>
            <perch:label for="commentHTML">Comments</perch:label><br>
            <perch:input type="textarea" id="commentHTML" required="true" label="Message" antispam="body" />
            <perch:error for="commentHTML" type="required">Required</perch:error>
        </div>
        <div>
            <perch:input type="hidden" id="parentID" value="<perch:comments id="parentID" />" />
            <perch:input type="hidden" id="parentTitle" value="<perch:comments id="parentTitle" />" />
            <perch:input type="submit" id="submitComment" value="Submit" class="button" />
        </div>
    </fieldset>
    <perch:success>
        <p>Thanks for taking the time to review our product! Your comments will appear on the site once approved.</p>
    </perch:success>
</perch:form>

Comments Display:

<perch:before>
    <hr />
    <h2>Reviews</h2>
    <perch:if not-exists="commentName">
        <span id="no-reviews">There aren't any reviews for this product yet... :(<br>
        Be the first to review it!</span>
    </perch:if>
    <ul class="ratings">
</perch:before>
        <li id="comment<perch:comments id="commentID" type="hidden" />">
            <img src="//www.gravatar.com/avatar/<perch:comments id="commentEmail" type="email" label="Email" order="2" hash="md5" required="true" />?s=120&amp;d=mm" width="60" height="60" />
            <div style="display: inline-block">
                <perch:if exists="commentURL"><a href="<perch:comments id="commentURL" type="url" label="URL" order="3" />"></perch:if>
                    <strong><perch:comments id="commentName" type="text" label="Name" order="1" required="true" />
                <perch:if exists="commentURL"></a></perch:if></strong>
                <span rel="bookmark" class="date"><perch:comments id="commentDateTime" format="%b %d, %Y" type="date" time="true" label="Date" /></span>
            </div>
            <div class="comment">
                <span class="rating-display">
                    <perch:if id="rating" value="5">
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                    </perch:if>
                    <perch:if id="rating" value="4">
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                        <i class="far fa-star"></i>
                    </perch:if>
                    <perch:if id="rating" value="3">
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                        <i class="far fa-star"></i>
                        <i class="far fa-star"></i>
                    </perch:if>
                    <perch:if id="rating" value="2">
                        <i class="fas fa-star"></i>
                        <i class="fas fa-star"></i>
                        <i class="far fa-star"></i>
                        <i class="far fa-star"></i>
                        <i class="far fa-star"></i>
                    </perch:if>
                    <perch:if id="rating" value="1">
                        <i class="fas fa-star"></i>
                        <i class="far fa-star"></i>
                        <i class="far fa-star"></i>
                        <i class="far fa-star"></i>
                        <i class="far fa-star"></i>
                    </perch:if>
                </span>
                <perch:comments id="commentHTML" encode="false" html="true" type="textarea" label="Message (HTML)" order="4" required="true" />
            </div>
        </li>
<perch:after>
    </ul>
</perch:after>