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ART FK/IK switch twists limbs

hello!

I’ve asked this over on the answerhub at first, but never received a reply, so I thought I’ll try here; maybe one of you fine people can help me out :slight_smile:

I rigged a character with the Animation/Rigging Toolkit but for some reason some of the orient constraints in the anim rig have rotation values baked in.
so when I switch from FK to IK and vice versa weird stuff if happening.
stuff like this

this happens in quite a few places, the wrists, the ankles, the shoulder.
I haven’t been able to figure out how to fix it;

I changed some settings in the IK constraints like interpolation type, but that didn’t help.
I tried rebuilding the rig again from all the way back at ‘skeleton placement’ but that didnt work either.

any idea how I could go about fixing this rotation issue? :confused:

here’s another screenshot just to illustrate. look at how the rotation values of the wrist change

f7c06ef42d73dad4f0b170a4f78b4b1e3003a738.jpeg
d59aafe85bd28e1dd19d0e3e4feba83201bf8d34.jpeg

any ideas would be much appreciated.