I figured I'd write this to show how hard it can be to keep a site online 24/7. This report is pretty tame - and it's just from a single week at Linux-Tips.us. The numbers are often higher, sometimes by a wide margin:
Hopefully you can read that. I had to zoom out quite a bit to get it all into one screenshot.
That's just from a single layer of my site's defense. That's the stuff that made it through other layers or stuff made it through this layer.
There are constant attacks. This is a mild weekly report.
I guess what I'm trying to say is that it's difficult to keep a site online all the time. As frustrating as it is, there's a whole lot that's beyond our control.
If the tab has been open for a while, refresh it before typing anything and pressing the post reply button.
The problem you posted can be either an outage or you're no longer considered 'secure' (see the Cloudflare loading screen that 'scans you') by CloudFlare.
So, if the tab has been open for a while, hit refresh first.
I'm not sure how long that 'while' is, however. If I had to guess, I'd say it's at least a 30 minute window. It's less if you've gone messing about with your IP address via a VPN! (So I have learned through repeated spankings from Cloudflare.)
I always "Select All", then "Copy" before I click the "Post Reply" button on any forum. If something goes bad, I open a text editor window on my desktop and save the post before dealing with the issue.
After doing my own research, I figured out that forums like Linux.org have installed a special detector in their servers. They installed it just for me. It knows when I forget to "Select All, Copy" ... and that is when it triggers the failure and loses the contents of my reply. :-(
Under normal circumstances, the forum will also save a draft for you.
We're behind CF so the boss man could actually enable browser cache - where what you type is stored in your cache until you hit the post button. That might work better than the forum's draft system, considering the regular outages.