Dev/build on multiple instance silverstripe 3.x

<%- if @topic_view.topic.tags.present? %>
<%= t 'js.tagging.tags' %>: <%- @topic_view.topic.tags.each do |t| %> <%= t %> <%- end %>
<% end %>

Silverstripe Version: 3.7.3

Question:
i have website build with silverstripe run with multi instance with load balancer, after i update the code and add new field in search summary of dataobject. i do dev/build?flush=1, it work but when i refreshing and get other instance the filters gone.
maybe there some best practice to do dev/build with multi instance?

// Include any relevant code. If you have a lot of code, link to a gist instead.