Oh you are lucky, I would have banned that for sure.
I also had something strange yesterday- I typed a semi-long response in a different thread, and I hit the post button on the bottom, and it disappeared and I got a 'log in using 2 factor authentication" pop up on screen. Sometimes strange computer issues happen. Of course I couldn't refresh or go back and retrieve the message and had to re-craft it.
In the future I hope I remember to save the whole message before posting.