Directional light shadows disappear when camera is rotated

[GitGhillie]

Hi all,

I've loaded a single gltf, added a directional light and my player.
Everything looks fine when the camera is horizontal:

Slightly looking down some of the shadows start to disappear:

Any idea what could be causing this?
I've got DirectionalLightShadowMap size set to 4096 and playing around with the CascadeShadowConfigBuilder did not seem to change anything other than the quality of the shadows.

Camera3dBundle settings:

Camera3dBundle {
                transform: Transform::from_xyz(0.0, 1.8, 0.0),
                projection: Projection::Perspective(PerspectiveProjection { fov: 1.0, aspect_ratio: 1.859, near: 0.1, far: 1000.0 }),
                ..default() },

[superdump]

I wonder if this is a problem with normals.

[GitGhillie]

Fixed by #8645