I can’t reproduce this. In your screenshot, are you in a fresh, new scene, or is this a file where lots of settings have been changed in the past?
If you are in a new scene, it sounds like a bug. I would try 2 things in that case.
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Set Cycles to cpu mode. It’s more stable and less likely to have bugs. Or try switching between device types if you can (Optix / Cuda etc.).
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Try it in an other version of Blender. It could be a newer bug.
maybe share your file?