There are 3 known potential issues when using Cloudflare with your HostBill.
Problem: I'm using Cloudflare on the server where my HostBill is installed.
In various User Interface sections (both admin and client) I'm getting weird behavior - page elements are not loaded.
Solution: This issue is most likely caused by Cloudflare Auto Minify feature. To disable just HTML part of it:
Problem: I'm using Cloudflare on the server where my HostBill is installed. Auto-updater fails with HTTP 403 error
Solution: Ensure your HostBill server IP is whitelisted/bypassed from Cloudflare checks
Problem: I'm using Cloudflare on the server where my HostBill is installed.
In various Admin Interface sections I'm unable to store order of items that offers drag and drop order feature.
Solution: This issue is most likely caused by Cloudflare Query String Sort. To disable: