[rubyforgood#5777] Fix missing instantiated object every now and then

app/components/form/step_navigation_component.html.erb

@@ -3,7 +3,7 @@
     <%= button_tag type: @submit_back ? :submit : :button,
         name: :nav_step,
         value: @nav_back,
-        class: "btn btn-link", 
+        class: "btn btn-link #{@nav_back.nil? ? 'disabled' : 'enabled'}", 
         title: "Back step", 
         aria: { label: "Back step" }, 
         disabled: !@nav_back do %>
@@ -16,7 +16,7 @@
     <%= button_tag type: @submit_next ? :submit : :button, 
         name: :nav_step,
         value: @nav_forward,
-        class: "btn btn-link", 
+        class: "btn btn-link #{@nav_next.nil? ? 'disabled' : 'enabled'}",
         title: "Next step", 
         aria: { label: "Next step" }, 
         disabled: !@nav_next do %>

app/controllers/case_contacts/form_controller.rb

@@ -23,15 +23,18 @@ def update
     @page = wizard_steps.index(step) + 1
     @total_pages = steps.count
     @nav_step = params[:nav_step]
+
     params[:case_contact][:status] = step.to_s if !@case_contact.active?
     remove_unwanted_contact_types
     remove_nil_draft_ids
 
     if CaseContactUpdateService.new(@case_contact).update_attrs(case_contact_params)
       respond_to do |format|
         format.html {
-          render @nav_step.split('/').last.to_sym if @nav_step.present?
-          if step == steps.last
+          if @nav_step.present?
+            jump_to(@nav_step.split('/').last.to_sym)
+            render_wizard @case_contact, {}, {case_contact_id: @case_contact.id}
+          elsif step == steps.last
             finish_editing
           else
             render_wizard @case_contact, {}, {case_contact_id: @case_contact.id}

app/views/case_contacts/form/expenses.html.erb

@@ -1,7 +1,7 @@
-<%= render(Form::TitleComponent.new(title: @case_contact.decorate.form_title, subtitle: "Contact expenses", step: @page, total_steps: @total_pages, navigable: Form::StepNavigationComponent.new(nav_back: previous_wizard_path, nav_next: next_wizard_path, submit_back: true, submit_next: true))) %>
 
 <div>
   <%= form_with(model: @case_contact, url: wizard_path(nil, case_contact_id: @case_contact.id), local: true, id: "casa-contact-form", class: "component-validated-form") do |form| %>
+    <%= render(Form::TitleComponent.new(title: @case_contact.decorate.form_title, subtitle: "Contact expenses", step: @page, total_steps: @total_pages, navigable: Form::StepNavigationComponent.new(nav_back: previous_wizard_path, nav_next: nil, submit_back: true, submit_next: true))) %>
     <%= render "/shared/error_messages", resource: @case_contact %>
 
     <div class="card-style-1 pl-25 mb-10 pr-50">