When public users access our contact us form page, they’ll some times see cached user information from other previous submissions. I navigated to the administration–>performance page and found that pages which contains captcha will disable caching. We were going to try out the CacheExclude module but if caching is already disabled on this page because of the captcha module being in place, I’m not sure what’s causing it to populate other peoples information on the form. If you require anymore info, let me know. Thank you.
Drupal Core 7.39
Ubuntu Server 14.04.3