Weird, we do exactly this a lot. And @kokolegorille the issue with content_tag is that it isn’t really usable with live view. You can’t for example do live_component inside of it and have it work correctly.

        <%= case @event do  %>
        <% %{type: :research_status_changed, data: status_change} -> %>
           stuff

        <% %{type: :labeling, data: %{comment: comment, user: user}} = event -> %>
             stuff
        <% end %>

This is pulled straight out of our codebase.

Can you provide a reproduceable example?

Just a guess but… did you try without this html comment?

You should use a helper for this… and try to remove any logic from template.

<%= display_nav(@nav) %>

and in page_view.ex

def display_nav(:post) do
  content_tag(:div) do
    "whatever"
  end
end
# etc.