.cache.html files downloading twice

Hi

  I have a application developed using GWT 2.6 and deployed in one of our environment which needs to be accessed through VPN  but getting one issue in some cases

• *.cache.html files are downloading 2 times (size is 821KB,Image is attache here ) which will take time to load the application
  
• The same i can't reproduce in my local environment meaning only one *.cache.html file is downloading if I deploy on my local vm
• Any idea what causing this issue

Note: i have added 2 servlet filter whenever the host page loads(/hostpage.html) for some other reason which will not execute in the above case. 

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