The passage from the algorithms of full image to local, is not obvious ... It is obvious that the taking into account of a reference point (hue, chroma, lightness) brings deep differences of behavior, of course without speaking of the remainder of the shape detection alogorithm.
Without going into detail, there are several ways to deal (beyond the settings themselves):
1) by choosing "global quality", which will notably take into account the impact of chroma noise
2) scope that treats the extent of hue
3) the 2 cursors: threshold and iterations
In the case of "Tone mapping", one can not have everything and its opposite. In some cases, and this is not a bug, but the algo that does what it is asked, it will be necessary to reduce either "threshold" or iterations, and possibly to set them to zero.
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