Hey Facebook, rapid release is great, but you broke my Messages, Notifications, Quick Help, and caret buttons on my https://www.facebook.com navigation bar. It's been broken for a few hours now, clicking on it does absolutely nothing. Chrome 60 browser, macOS.
I see this happen not infrequently. Clearly their values still weight "move fast & [don't worry too much when we] break things" over reliability. Which for a site of this nature is a somewhat defensible choice, but for those of us who come from enterprise software for example, or expect a reasonably stable user experience, it's occasionally between disconcerting & annoying
Maybe you need to slow down.