Question: I have a question regarding a website I am working on. 
**The problem:** 
WordPress redirects me to homepage if I click on update in the admin section. It only does that if I add more text to the webpage and it also does not do that on all the posts or pages. It only does that on some. 

**This I have checked:**

The problem is only on the new live server, not the development one.

I have tried removing all plugins and the theme.
I have also removed all caching. 
When I got in touch with the hosting company to increase the php memory, it did help I think, as I was able to update more posts, but it did not solve the problem completely. 

Now, the question is, why it redirects me to homepage? Because if it was some memory issue, I think it should throw errors, not redirect me to homepage, am I right? 

I hope someone had similar experience. I did look for people with similar issues, but I did not find any having the same problem.

Thank you for all your help!

Josif

Answer: 
I was running into this due to the OWASP ModSecurity rules enabled on the server and causing false positives. Disabled, solved. [Not a new problem](https://forums.cpanel.net/threads/owasp-mod-security-and-wordpress.452091/).
i had this issue and i turned out my WP Firewall plugin had a false positive for a "WordPress-Specific SQL Injection Attack."