Clusterization broken in 3D view

[x128]

Well, it's not a true 3D "flyover" view, it's about changing the camera view angle with two-fingers up&down "scrolling". Clusterization seems to be always broken after setting the lowest view angle (in any cases). It's never broken with other view angles.

Here's the demo project screenshot:

iPhone 6S, iOS 10.3.2