Why YSK: It will start working faster if you give it a sec.
This is a bug in iOS Progressive Web Apps. Your scrolling gets locked to an element that is off the screen. Continuing to try to scroll while it’s in this locked state keeps it in the state longer. No interactions for one second will unlock it.
wefwef are tracking the issue here.
Also speaking of the keyboard, I had a more annoying bug a couple of time. Basically, my lockscreen has an alphanumeric password and in a couple of occasions the keyboard would never pop up, so I had to reboot my phone :/
But it’s overall pretty stable for a beta.