cPanel + CloudFlare issue (CSS being messed up)

The problem seems to be occurring for all accounts accessed through domain name:
But not when logging into cPanel through the server’s hostname at instead.
This appears to be caused by “” using CloudFlare’s IP address for its A record and conflicting with the “Cookie IP validation”.
You should do the following:
WHM > Tweak Settings

Cookie IP validation > disabled
If you’d like to continue using “Cookie IP validation” on your server, users will need to access cPanel through the server’s IP or hostname directly to circumvent this issue.