user505 on "Issue with WordPress going unresponsive"

The problem was solved on my website.Nothing was wrong with my web code and nothing is wrong with your WordPress setup.There is nothing you can do on YOUR side to fix this.
I contacted their tech support and asked them to whitelist my IP address in their ModSecurity settings so I won't get flagged as a spammer.Now I don't get the blank page anymore.It is the ModSecurity that thinks you are a spambot after adding or modifying few things in 1-2 minutes.I think their security settings are way too strict.
Hopefully your IP is static or at least a cable connection so it doesn't change the addresses after every modem reboot.
Good luck !