Thanks for the help. I'll try this out next time it happens. I already used another pose with the hand to avoid the issue. Wasn't what I wanted but whatever. Next time everything will work out great.
Pose is not a problem. You use morphs with incorrect joints.
Saint is right. Adjusting rigging to shape should help, but only with this particular pose. If you want to fix model you must adjust rigging in zero pose, without any hidden jmc morphs. Anyway it fix model untill you change morphs (not pose).
You should:
- pose your figure to zero,
- switch on "edit mode" in "parameters" tab,
- set unfixed morph to 1 (or 100%)
- adjust rigging (according to tips above)
- select morph "Erc freeze" and and accept all.
- fixed morph save as => support asset => morph asset
Your morph should works correct every time when you load figure.