STEPS TO REPRODUCE
1. Launch iClone 6
2. Apply embed non-human content - Horse
3. Press A on keyboard, turn the camera on the side of the character
4. Pick this character, press N on keyboard
5. On Edit Motion Layer panel, press and hold "Ctrl" on keyboard, then click "Bip01_Tail1" (Blue Bone)
6. Click "Bip01_Tail4" (Yellow Bone)
7. Press W on keyboard, drag the Gizmo along with the Z axis

ACTUAL RESULT
The bone will bounce abnormally

EXPECTED RESULT
The bone will follow the axis to move