Lightning Leaf

Thank you!

I upload my character to Mixamo, rigging, and downloading rigged character. I imported it in a Cinema 4D file and I edited the motion. However, I saved it and reopened it, The pose was not saved. Also, I do ctrl + z for undo, the pose reseted everything. I just want back previous pose... How can I fix it?

After rigging, when I change the pose of the figure object, the shape collapse. This rigging, or is the model object is wrong? Is there any way to prevent this?