title: F5 Add apm_do_not_touch to HTML response to the end user
body: <p>I am supporting ASP.NET application running on 3 web servers and have F5 system as firewall and load balance. Actually I don't have experience at all in F5 system but the following issue seems to be related to it</p>
  
  <p>The issue happened after we applied F5 load balancing. Simply it cause JavaScript in the web page to fail sometimes. After refresh the web page it will work fine</p>
  
  <p>To trace the issue I compared the response that fail and the one that success after refresh. The difference was the failed one contains html tag that is not added by our application <strong>apm_do_not_touch</strong> with a script tag inside it</p>
  
  <p>It seems that happen when the F5 switch between one server to another one as the issue solved when we redirect all the traffic to only one server</p>
  
  <p>Any advice, what is the possible cause and how we can solve it?</p>