How to avoid flickering knees/ewbows on mocap anim exported from iclone8

Hey guys, my animation coming from mocap on iclone8 is ok, but when I export it to fbx, blender target, it gets weird flikering movements on the extremety members at some points of the timeline, ex: export result knee or ewbow moves sligtly sideways back and forth fastly, and the original animation that doesn’t happens is that a way to configurate the file before export it on Iclone8? Set to keep the IK? Idk, maybe some config Im missing before export it? Or the manual fixxing on the export result animation is always something to expect? Thank you.