Device orientation dependent SwiftUI Metal problem: RBLayer: unable to create texture: BGRA8Unorm

Question

My iPad app has a View that uses a Metal shader as described here.

#include <metal_stdlib>
using namespace metal;

[[ stitchable ]] half4 borderField(float2 position, half4 currentColor, float2 size, half4 newColor) {
    assert(size.x >= 0 && position.x <= size.x);
    assert(size.y >= 0 && position.y <= size.y);

    // Compute distance to border
    float dt = size.y - position.y;  // Distance to top
    float db = position.y;     // Distance to bottom
    float dl = position.x;      // Distance to left
    float dr = size.x - position.x;  // Distance to right
    float minDistance = min(min(dt, db), min(dl, dr));
    float r = minDistance + 1.0;
    float strength = 1.0 / sqrt(r);
    return half4(newColor.rgb, strength);

}

It is applied to my View using the following modifier:

.colorEffect(ShaderLibrary.fields(.floatArray(viewModel.floatArray)))

The app can use any device orientation.
If I launch it in portrait orientation, the View is displayed correctly:

If I turn the simulator left and launch the app in landscape orientation, the following error is logged:

RBLayer: unable to create texture: BGRA8Unorm, [8.196, 5.200]

and the View is not colored:

If I turn the simulator back to portrait mode while the app is running, the View is again colored correctly.
However, if I turn it left again while the app is running, I get once more the same error, but the View looks now differently:

I don't have experience in Metal programming, and I have no idea what is wrong.
There are 2 posts that report a similar error, but apparently they do not apply to my case: This one, and this one.

Any suggestions?