Strange Wordpress Problem

I've been searching for the last day and trying to solve this problem and am getting nowhere.

Hopefully someone can guide me in the right direction.

When editing old post the post takes a long time to update 2-3 hours.
Wordpress comments also take a 2-3 hours to show after being approved.

Things I've done.

I am using autoptimize to cache the site and tried emptying the cache and deactivating it.

Deactivate plugins.

Cleaned up MySQL by deleting old revisions, removing spam comments.

I have other sites on the same shared hosting with the same theme and have no problems with them.

Anyone ever see this problem before? It's almost like a cache problem but I only use the Autoptimize plugin and have emptied the cache and deactivated it.

If all else fails, copy the post, delete it, and repost it with the scheduler for the original date it was posted on.

OutOfTown said:

If all else fails, copy the post, delete it, and repost it with the scheduler for the original date it was posted on.

Click to expand...

It is semi large site with around 400 post several of which need to be updated regularly.

They do update but only after 2-3 hours which is a pain to edit them.

Oh you meant post's in general. I'm assuming you've tried WP Super Cache right?

No I have never used WP Super Cache. Was going to but have been happy with Autoptimize.

Give it a try and see if that doesn't help. https://wordpress.org/plugins/wp-super-cache-clear-cache-menu/

Your hosting might not be enough to handle whatever you have on your site. If you have a cPanel you can go and check memory usage stats. I've had this problem a few times.

you theme sucks

Check your hosting setup. If you've been using autoptimize, you may have varnish on the server which could be causing the cache issues. It's a caching HTTP reverse proxy that sits in front of the server. So, even if you've disabled your wordpress caching plugin, varnish could be serving from the cache.

Much as I hate to link to godaddy, here's some info on checking for varnish caches: https://www.godaddy.com/help/how-to-test-varnish-using-curl-12388

If it is causing the problem, there's plugins like varnish purge which you can use to clear the cache, either manually or on specific pages when you update them. Tbf, I've not used this myself so make sure you read the documentation properly and if you're not sure, check with your hosts.