STEPS TO REPRODUCE
1. Launch iClone 6
2. Apply G6 Character Heidi
3. Go to Frame 20, open Face Key and select Chin on Dummy's face
4. Move down the character's chin
5. Go to Frame 50, click "Reset All" button on Face Key panel
6. Go back to Frame 40, select Forehead on Dummy's face and modify character's expression by left-clicking

ACTUAL RESULT
The character's left lip-corner moved accordingly

EXPECTED RESULT
The left lip-corner of the character won't change automatically and it's face looks normal