This worked for me:
in my template instead of using this
<li><a href="https://stackoverflow.com/questions/44048156/?page={{ i }}">{{ i }}</a></li>
I wrote this:
{% if 'whatever_parameter_you_use_to_filter' in request.get_full_path %}
<li><a href="https://stackoverflow.com/questions/44048156/{{ request.get_full_path }}&page={{ i }}"{{ i }}</a></li>
{% else %}
<li><a href="https://stackoverflow.com/questions/44048156/?page={{ i }}">{{ i }}</a></li>
{% endif %}
I hope it helps 🙂