I have already reported this before but apparently, it was not fixed.
Every once in a while, my Facebook friends list will be empty, both in the web UI and in code. I'm attaching two screenshots taken at the same time. One is my wife's profile and the other is my own. You can see that my profile appears in her friends list, but my friends list is empty.
https://i.imgur.com/rvYfI0z.png
https://i.imgur.com/DOtEqwO.png
The title ID is: 4A90