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.
oh my god the webkit bug is over two years old apple really wants people using the app store jesus
Yeah, that was pretty sad to see. Hopefully the talented wefwef devs can figure out a work around.