how to fix the size of the comment section? - html

Question

I'm working on a comments section for a blog in Flask. Having a very poor understanding of html, I decided to go with a public domain template. The script below works great, just one problem! After each submission, the comment window shrinks. Does anyone know how to make the size of the comment window constant?
{% for comment in post.comments %}
<div class="container my-2 py-2">
<div class="row d-flex justify-content-center">
<div class="col-md-12 col-lg-10">
<div class="card text-dark">
<div class="card-body p-4">
<p class="fw-light mb-4 pb-2"> Recent Comment By: </p>
<div class="d-flex flex-start">
<img class="rounded-circle shadow-2-strong me-2"
src="{{url_for('static', filename='uploads/' + comment.user.image_file)}}" alt="avatar" width="60"
height="60" />
<div>
<h6 class="fw-bold mb-2">{{comment.user.username}}</h6>
<div class="d-flex align-items-center mb-2">
<p class="mb-0">
<i> {{comment.datetime.strftime('%B %d, %Y')}} </i>
{% if user.id == comment.author or user.id == post.author %}
<a href="/delete_comment/{{comment.id}}">
<span class="badge bg-danger">remove?</span>
</a>
{% endif %}
</p>
</div>
<p class="mb-0"> {{comment.text|safe}} </p>
</div>
</div>
</div>
</div>
</div>
</div>
{% endfor %}