Hi, NotMyFault.
Thank you for your explanations. I am aware of the higher dynamic range that is not to be saved in a jpeg, but as you mention, the tone mapping is compressing the range, and therefore allowing to save the image in a jpeg. That is were I'm getting confused, because the problem that I mention is after tone mapping.
Find enclosed some captures of the export preview where, even in 32bit exports, the image is still burnt. This is absolutely not what I'm seing in the screen before exporting.
I have been playing around with all the options, trying to understand this issue, and I have stumbled on the "Clamp to SDR" checkbox within the tone map persona. When I activate this checkbox, then I see the image burnt also in the screen and not only when I export. Maybe this checkbox has some usage?
Anyway, why after tone mapping I'm still having lightness values above 1? This shouldn't be, should it?