I am using Sitecore 8.1 (rev. 160519). In sitecore FXM experience editor i have added one placeholder and component on it and publish all these changes , but it is not reflected on External Site. There is no error in fxm log files and the component showing correctly in FXM experience editor. When i try to figure out the external app post call request all was good but the component data is not present in the post call response. There is also one capture click action which is working fine on external site and the click event is also getting capture in Sitecore Analytics. But the added component is now showing on external site. Below is the response for the external site post call ,

> {"ContactId":"17c0b00fdc2940bb9bfd9e18ebe16b1b|True","SessionId":"pwes2czzeopmpwu5yxvsinv4","ContactExpires":"2019-06-09T15:38:33.2587405",
> "SessionPath":"/","ElementMatches":[{"Event":"click","Selector":"#sampleTest8","MatchType":"event","Id":"{55E71BAE-B122-4368-8336-87971355D099}"},
> {"Event":"click","Selector":"#myButton","MatchType":"event","Id":"{A3433F6F-CFE2-4642-B98F-DBFA8937B1AC}"},
> {"RenderedContent":" action=\"/sitecore/api/ssc/Beacon/Service/beacon/trackPageVisit/?
> contactId=17c0b00fdc2940bb9bfd9e18ebe16b1b%7CTrue&sessionId=pwes2czzeopmpwu5yxvsinv4&
> page=http%3A%2F%2Fuatatpredesignexternalappfxm%2F&referrer=&rt=1497008313221\"
> id=\"ctl00\">\r\n\r\n type=\"hidden\" name=\"__VIEWSTATE\" id=\"__VIEWSTATE\" 
> value=\"/wEPDwUENTM4MQ8WAh4TVmFsaWRhdGVSZXF1ZXN0TW9kZQIBZGS4wHrFc7sgWChOhH+pjsBq5hYlqg==\"
> />\r\n\r\n\r\n \r\n\r\n\t type=\"hidden\" name=\"__VIEWSTATEGENERATOR\"
> id=\"__VIEWSTATEGENERATOR\"  value=\"B82EF22B\"
> />\r\n","RenderedPosition":"{B8F49EBF-2542-4CB0-B3BB-63858918CE8B}","Selector":"#sampleTest1> > b" ,"MatchType":"content","Id":"{D8C7CE48-E12A-4703-A16D-C0F20D728B2F}"}],"Id":null,"Url":null}