Do you have the Fastest Cache plugin is not installed?))) In this plugin there is a "cache site" and "do not cache the website for admins and authorized users". Now, you go to the site and do not see a cached version, come out and see the cached version. In General clean the cache plugin. Search for plugins:
fastest cache, w3 total cache, ninja pagespeed, wp rocket etc.
PS not to be confused with the browser cache
P. P. S. one of my clients somehow manage important changes to be cached and every time when cleaning the cache lost its data and complained that the website crookedly works)))