Steps to reproduce:

1. Open attached project
2. Open scene "test"
3. Select "SA_Character_1P_Basepose" in hierarchy
4. Notice that it has Override Test script attached. Turn "Override" off
5. Run scene and notice that after ~3 seconds character raises his hands
6. Stop the scene, select "SA_Character_1P_Basepose" again and turn "Override" on
7. Run scene and notice that after 3 seconds nothing happens
8. Open "SA_Character_1P_Basepose's" Animator
9. Open properties of "Aim" layer and change "weight" to 0
10. Run scene again and notice that animation works again