Turbo not picking up and replacing Stream

I have a curious issue. Elsewhere in my site this exact code works just fine but something is different here. The only difference I’m doing is in the way I call the code. The one I will show you here is called via a fetch request in a stimulus controller. The issue is that upon getting back a turbo stream response from the server with a correctly formatted turbo frame element to a page with a matching turbo frame tag, nothing happens. No error, no useful output in the logs, the modal doesnt show up on screen nor does the modal html get updated.

If I instead call this path from a link_to helper for example, it works just fine. Problem is I need this to be through javascript as I need to gather up data for a submit of sorts as mostly shown below.

HTML Button/Controller

<%= turbo_frame_tag :modal %>
<div data-controller="dynamic" data-dynamic-grouping-value="<%= author_id %>">
    <%= g.label :element_type, "Element Type" %>
    <%= g.select :element_type, get_select_data, { include_blank: "Pick a Type" }, class: "select element-type", "data-dynamic-target": "type" %>
    <div class="button lrg-button" data-action="click->dynamic#get_modal">Choose Element Content</div>
    <div class="element-data" id="element-data-" data-dynamic-target="data"><%= get_element_data(g.object) %></div>

Stimulus Controller

let position = $(this.dataTarget).attr('id').replace('element-data-', '');

        let data_ids = [];
        $.each($(this.dataTarget), function(index, value){

        if(this.typeTarget.value !== '') {
            let data = {
                type: this.typeTarget.value,
                data_ids: data_ids,
                position: position,
                grouping: this.groupingValue
            call("/show_element_modal", data, "modal", "update")

The actual fetch method in call

fetch(url, {
        method: 'post',
        body: JSON.stringify(data),
        headers: {
            "X-CSRF-Token": csrfToken,
            "Content-Type": "application/json"
        responseKind: "text/vnd.turbo-stream.html"
        .then(response => response.text())
        .then(html => check_action(html, action, id_to_affect))

Rails Modal methods

def show_element_modal
      "Choose Content",
def show_modal(data, active_ids, model, object_id, action, title = "Title", searchable = false, confirm = "Save", cancel = "Cancel", multi_select = true, extra = nil)
    get_modal(data, active_ids, model, object_id, action, title, searchable, confirm, cancel, multi_select, extra)
    render turbo_stream: turbo_stream.update(:modal, partial: 'shared/modal/show_modal' ), content_type: "text/vnd.turbo-stream.html"

Final Modal HTML to render in partial

<div class="modal">
  <div class="column">
    <input type="hidden" name="<%= @model.to_s %>" id="model" value="<%= @model.to_s %>">
    <input type="hidden" name="<%= @action %>" id="action" value="<%= @action %>">
    <input type="hidden" name="<%= @extra %>" id="extra" value="<%= @extra %>">
    <input type="hidden" name="<%= @multi_select %>" id="multi_select" value="<%= @multi_select %>">
    <input type="hidden" name="<%= @object_id.to_s %>" id="object_id" value="<%= @object_id.to_s %>">
    <div class="modal-title"><%= @title %></div>
    <% if @searchable %>
      <div class="row content-search">
        <%= text_field_tag :search, {}, class: "text-input", id: "content-search-input" %>
        <div class="submit-content-search button">Search</div>
    <% end %>
    <div class="column modal-list">
      <% @modal_data.each do |data| %>
        <% name = data.title if data.has_attribute?(:title) %>
        <% name = data.name if data.has_attribute?(:name) %>
        <div class="row modal-item <%= "active" if @active_ids.include?(data.id) %>" data-item="<%= data.id %>"><%= name %></div>
      <% end %>
    <div class="row modal-controls">
      <div class="modal-save button"><%= @confirm %></div>
      <div class="modal-cancel button"><%= @cancel %></div>