Disappearing Content I just inherited a Drupal 7 website from another agency. The site was fairing well in our DEV and STAGE environments. The problem started occurring when we switched DNS over to our PRODUCTION site.

We have all the nodes (from the same content type) that seem to be "randomly" disappearing.

I've made sure to upgrade the core to the latest and any security fixes for any modules that are being used.

I was wondering what I could do to troubleshoot this issue - as I'm exhausting all my efforts and nothing seems to be working.
It looks like a cache problem. I will suggest to do this, as usual backup is always a good idea:


See if this happens also if you are login. You might have your node permissions corrupted. If you rebuild and have a lot of node, it might take a little while to do this.
Turning cache off for page and blocks.
is your content generated by a view? if so check the permission