(I worked at FB, but not on this.) It's probably a bug. I use the FB apps on Android and Chrome on Win/Mac, and sometimes the notification thing goes out of sy

(I worked at FB, but not on this.) It's probably a bug. I use the FB apps on Android and Chrome on Win/Mac, and sometimes the notification thing goes out of sync and is stuck on "1" for a few days, and nothing seems to help. Then eventually it goes away. I'm 99.99% sure this is a some cache/consistency bug and not a trick. It's super annoying when it happens to me.