Content mismatch random error !!

[shahzaib mushtaq]

Hi,

Sometimes we encounter Content mismatch error in browser on website &
refreshing the page fix this issue. The full error is :
http://prntscr.com/esp3jr

Here is nginx.conf file : https://pastebin.com/VF5L1xXy

Some people on different forums saying its due to proxy cache but we're not
using any kind of cache except for File-Descriptors cache config in nginx.
The setup is built on pure NGINX+Php-fpm.

Thanks for the help in advance !!

Shahzaib
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