Hi Pronl,
Thanks for the replies. I have put a copy of the site on one our demo servers and activated the ithemes security plugin with the same features yesterday. The demo site has yet to crash.
We have other sites with the same plugin though maybe a bit out of date. But the same paths and files exist with the same code and those sites don’t crash. These are also on a different production server. The site that is crashing is on our newest production server and it is the only WP site on it.
One thing I noticed yesterday, I was browsing the site and it was not rendering properly. The drop down menus at the top were gone. I tried multiple browsers, but the site did not render correctly again until I recycled the app pool.
I was going to wait for the site to crash again to see if the same exact error occurs.