Tree support wrong?

I have order an p1s (still waiting for get it at home) but i started to look at bambu studio.

And i got some strange result regarding Tree support
i mainly use for now cura.
With a model i got trouble to get something close from cura.

For example i wan’t support from bed only for 85° + ovehang
result on cura
cura

result on bambu studio (with parameter used for support) Tree(auto) , From buildplate only and 15° threshold support


I also try to change Tree support branch angle and set manually support part without success
For me if i tick from bed only support seem to be broken on bambu it support way below the threshold defined and not event (in picture look like overhang less than 45° seem to be supported for no reason and hook part not supported at all

did i miss some setting for getting something closer to cura or from bed only is broken ?

in case of someone would try the model is here : Foldable Hanger - print all at once by wuguigui - Thingiverse