Django URL with arguments pointing to the same page using "with as template"?

This is the weirdest problem I have ever come across. Here is it:

URLS.py

from django.conf.urls import url

from . import views

app_name = 'discussions'

urlpatterns = [
    url(r'^$', views.index, name='index'),
    url(r'^(?P<question_id>Q[0-9]+)$', views.question, name='question'),
]

Views.py

def index(request):
    return render(request, 'discussions/discussion.html',
                  {"questions": Question.objects.all(), "activities": Activity.objects.all()[:10]})
#details for this function question are not neccessary but still I have added them.
def question(request, question_id):
    question_id = int(question_id[1:])
    question = get_object_or_404(Question, id=question_id)
    questions = Question.objects.all()
    related = []
    answers = Answer.objects.filter(QID=question)
    for q in questions:
        score = (similar(q.title, question.title))
        if score > 0.3 and score != 1:
            related.append(q)
    votes = Vote.objects.filter(username=User.objects.get(username=request.user.username)).filter(
        Q(QID=question_id) | Q(AID__in=Answer.objects.filter(QID=question_id).values_list('id', flat=True)))
    return render(request, 'discussions/question.html',
                  {"question": question, "votes": votes, "related": related, "answers": answers,
                   "activities": Activity.objects.all()[:7], "form": AnswerForm()})

Models.py

class Question(models.Model):
    title = models.CharField(max_length=200 , default="")
    description = models.CharField(max_length=1055, default="")
    date = models.DateTimeField(default=datetime.now, blank=True)
    username = models.ForeignKey(User, on_delete=None)
    votes = models.IntegerField(default=0)
    count = models.IntegerField(default=0)

    def __str__(self):
        return self.title

discussion.html

{% for question in questions|dictsortreversed:"votes" %}
     <li class="list-group-item justify-content-between" data-toggle="tooltip" data-placement="top" title="asked by {{ question.username }} on {{ question.date }} has {{ question.count }} answers">
        <a href="{% url 'discussions:question'  with 'Q'|add:question.id as template %}" style="color: black"><h5>{{ question.id }}{{ question.title }}</h5></a>
        <span class="badge badge-default badge-pill bg-{% if question.votes >= 0 %}success{% else %}danger{% endif %}">{{ question.votes }}</span>
     </li>
{% endfor %}

Now the thing is in discussion.html on each question I want it to redirect it to its own question page which looks something like, website.come/discussion/Q5. Here 5 is the {{question.id}}. Now whenever I hover the mouse on the link, I am only redirected to the same page that is website.com/discussions

And the weirdest thing about this is that, whenever I open the page question.html, the all these things are working fine, the same code which is written in discussions.html works on that page!

How is it possible that I am doing same thing on both the templates and getting weird and irritating results?

Please feel free to ask me any extra information in the comments.

EDIT 1 However, if I change the URL pattern to

url(r'^(?P<question_id>[0-9]+)$', views.question, name='question'),

And change discussion.html link to:

<a href="{% url 'discussions:question' question.id %}" style="color: black"><h5>{{ question.title }}</h5></a>

Everything works perfectly and I m redirected to website.come/discussions/5