We tried to implement a workaround for that [1], but for some reason it still shows up from time to time. I really wish iOS Safari gave developers a way to disable these gestures!
[1] https://discourse.threejs.org/t/iphone-how-to-remove-text-se...
Also there are spots from which you can fall that lock you in a revival loop.
I am very sure scrolling is related to popups when you roll over popup points.