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P: Spot removal on 32bit image results in a noisy area
I'm working on TIFF images with 32bits depth in Lightroom 5.3 and I noticed that spot removal is not working properly on this kind of image.
On 32bits image, the area where I applied the tool became noisy: 
On the same image converted to 16bit the area seems smooth: 
Another example:
32bit image: 
16bit image: 
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