Updates dissapearing

So I’m building an internal website for the company I work for. The website is hosted on an internal sever; everything was going well until one day i begun to make changes and the changes would just disappear after i refreshed, odder still they would sometimes re-appear an hour or so later, but dissapear again a little later. Naturally I thought this was a caching issue, I emptied my browser caches and made sure i do not run any caching plugins. yet the issues still seem-to be continuing.

Whilst looking for a solution i came across this wordpress help post: https://codex.wordpress.org/I_Make_Changes_and_Nothing_Happens After following all the instructions I was unable to find a resolution to the issue.

Additionally changes to the HTML/CSS do not seem to suffer from this problem; only post/page updates and changes do.

Any idea how to resolve this issue?