Forms are forcing to http not https

We have Mautic installed and running on a secure internal domain but have noticed that all forms are being created with an action of http not https. I cannot find any setting that would force https on form generation. Is there a config file or some other setting at play here forcing the action to http? As a result, browsers on our main domain are giving mixed content warnings and the form action is being rejected

Code:
        <div id="mauticform_signup_parent_email"  data-validate="parent_email" data-validation-type="email" class="mauticform-row mauticform-email mauticform-required">
            <label id="mauticform_label_signup_parent_email" for="mauticform_input_signup_parent_email" class="mauticform-label">Parent Email</label>
            <input id="mauticform_input_signup_parent_email" name="mauticform[parent_email]" value="" class="mauticform-input" type="email" />
            <span class="mauticform-errormsg" style="display: none;">Email is required</span>
        </div>

        <div id="mauticform_signup_submit"  class="mauticform-row mauticform-button-wrapper">
            <button type="submit" name="mauticform[submit]" id="mauticform_input_signup_submit" name="mauticform[submit]" value="" class="mauticform-button" value="1">Submit</button>
        </div>

        <input type="hidden" name="mauticform[formId]" id="mauticform_signup_id" value="2" />
        <input type="hidden" name="mauticform[return]" id="mauticform_signup_return" value="" />
        <input type="hidden" name="mauticform[formName]" id="mauticform_signup_name" value="signup" />

    </div>
</form>

We have Mautic installed and running on a secure internal domain but have noticed that all forms are being created with an action of http not https. I cannot find any setting that would force https on form generation. Is there a config file or some other setting at play here forcing the action to http? As a result, browsers on our main domain are giving mixed content warnings and the form action is being rejected

<div id="mauticform_wrapper_signup" class="mauticform_wrapper">
    <form autocomplete="false" role="form" method="post" action="[b]http:[/b]//mydomain.com/form/submit?formId=2" id="mauticform_signup" data-mautic-form="signup">
        <div class="mauticform-error" id="mauticform_signup_error"></div>
        <div class="mauticform-message" id="mauticform_signup_message"></div>
        <div class="mauticform-innerform">

            <div id="mauticform_signup_parent_email"  data-validate="parent_email" data-validation-type="email" class="mauticform-row mauticform-email mauticform-required">
                <label id="mauticform_label_signup_parent_email" for="mauticform_input_signup_parent_email" class="mauticform-label">Parent Email</label>
                <input id="mauticform_input_signup_parent_email" name="mauticform[parent_email]" value="" class="mauticform-input" type="email" />
                <span class="mauticform-errormsg" style="display: none;">Email is required</span>
            </div>

            <div id="mauticform_signup_submit"  class="mauticform-row mauticform-button-wrapper">
                <button type="submit" name="mauticform[submit]" id="mauticform_input_signup_submit" name="mauticform[submit]" value="" class="mauticform-button" value="1">Submit</button>
            </div>

            <input type="hidden" name="mauticform[formId]" id="mauticform_signup_id" value="2" />
            <input type="hidden" name="mauticform[return]" id="mauticform_signup_return" value="" />
            <input type="hidden" name="mauticform[formName]" id="mauticform_signup_name" value="signup" />

        </div>
    </form>
</div>