Some fix

app/assets/stylesheets/extranet/_default/components/_persons.sass

+.person
+    line-height: px2rem(24)
+    position: relative
\ No newline at end of file

app/views/extranet/persons/_person.html.erb

-<article class="mb-4 position-relative">
+<article class="mb-4 person">
   <% if person.picture.attached? %>
     <%= kamifusen_tag person.picture, width: 400, class: 'img-fluid mb-2' %>
   <% else %>
     <%= image_tag 'extranet/avatar.png', width: 400, class: 'img-fluid mb-2' %>
   <% end %>
   <%= link_to person, class: 'stretched-link' do %>
-    <%= person.first_name %>
-    <b><%= person.last_name %></b>
+    <%= person.first_name %> <%= person.last_name %>
   <% end %>
 </article>