Open the Material Bundle Example from the examples tab.

Open Screen01.ui.qml (default)

Run the projet (works).
Live preview current file (crashes).

If both DRBloomTonemap effects are removed the example works.

DRBloomTonemap {
    id: hDRBloomTonemap1
    exposure: -0.5
    blurFalloff: 1
    bloomThreshold: 0
}

The parameters do not matter. The effect does not have to be applied to the environment.
Simply instantiating the object is enough.

The issue can be easily reproduced in a simple example (attached file).

You do not require QDS. You can use the qmlpreview standalone tool instead.

qml C:\example_test\BloomTest\content\Screen01.ui.qml (works)

qmlpreview qml C:\example_test\BloomTest\content\Screen01.ui.qml (crashes if you apply the first update)

If I remove the DRBloomTonemap effect qmlpreview works as expected.

(Qt Version 6.4.1)