Fling scroll doesn't work

[DeeeFoo]

So you know how in most Android apps, you can scroll through things quickly by simply touching the screen with a finger and flinging it upwards/downwards?

It's not working in some areas of PxView.

To understand what I mean, I have made two videos to illustrate the effect: https://imgur.com/a/IYUbML1

I'm using the same finger motion in both videos. In the first video, you can see that the scrolling stops abruptly the instant my finger ceases contact with the screen. It makes the scrolling feel very stiff. In the second video, you can see that the scrolling continues for a bit and gradually slows down, making for much smoother scrolling. This is the desired effect.

I'm on Android 9 Pie.