Posts Not Updating After Publishing

I have been looking for a solution to this for the last couple of days. I searched this forum and other webmaster forums around the Internet. I’ve seen several people have this same issue and some have resolved it. But when I try their solutions, they don’t work for me.

PROBLEM: I am able to publish a post okay with any feature I want; text, images, links, etc. The post will publish perfectly fine the first time. However, if I later notice something that I’d like to add, I’ll open the post to edit and make changes. As soon as I hit the ‘update’ button, the page reloads and all of my new changes simply disappear without posting.

ATTEMPTED SOLUTIONS:

• There have been suggestions to uninstall wp super cache plugin and remove it. I actually didn’t have any caching plugins installed, so this wasn’t an issue.
• There have been a couple solutions where one suggested turning off cache with a line of code in the wp-config.php file. Did that, didn’t work.
• Another poster created a plugin to turn off cache permanently. Installed, didn’t work.
• Deactivated all plugins and tried to update. No go.
• Removed all cache from Internet browser. Nope.

I’m hoping that one of you who has experienced this problem and found a solution not mentioned above will be able to help. I would greatly appreciate it as I am running out of hair to pull out of my head!

Thank you.