Attachables that are unloaded will save their controller states when reloaded instead of using their default states.

Steps to Reproduce:

1. Import the test resource pack;
2. Equip a shield in both hands (Both shields: default > first_person);
3. Have any other attachable items (bow, crossbow, trident, spyglass) readily available;
4. Activate the shield by crouching (Main shield: first_person > blocking_main_hand);
5. While still blocking, switch your held item to another attachable (Main shield: blocking_main_hand > default):
   Your offhand shield is automatically lifted in its place (Second shield: first_person > blocking_off_hand);
6. Switch back to the shield;
   Your offhand shield remains lifted and the main shield stays in its default state;
7. Stop blocking (Main shield: default > first_person, Second shield: blocking_off_hand > default > first_person);
8. Repeat the process but switching to any other non attachable item or an empty hand instead.

Observed Results:
The main shield comes back already lifted, as that was the state the right arm attachable was unloaded with.

Expected Results:
The main shield comes back in its default state after being unloaded.

Screenshots/Videos attached: Yes

Notes: The pack modifies the shield's animation controller to make them prioritize the main hand when both hands are holding a shield, automatically change to the offhand when the main hand's shield is disabled or removed, and keep the offhand shield lifted until it is either disabled or removed.