服务器随机返回状态码为200的空响应

I have the same site running on two different machines (behind the same firewall), same exact code. I have created a test plan with Jmeter that just hits the home page. If I run with first url everything works as expected and get Size in bytes 17265. If I then other size I get a size of 0. Both are returning 200 status.I have the same site running on two different m