I've been noticing a new bug with the alerts button on mobile (haven't tried on desktop) both chrome and Firefox.
It takes 2 clicks to get the alerts to pop down. 1st click it refreshes and removes alert red notification but no pop down, then second click pops down properly.
Nope. It's finicky. It shows up for me if I access the admincp on my phone but not other pages. I just added the site to my home screen via a shortcut. Does the same thing.