Iron's Spells 'n Spellbooks incompatibility, shields have no collision

[blbah]

Version Information

lithium-neoforge-0.15.0+mc1.21.1

Expected Behavior

Shields from shield spell have collisions and stop entities

Actual Behavior

Entities can pass through shields freely

Reproduction Steps

1. Cast shield
2. Lure mob through it
3. It goes through it

Other Mods

1. Iron's Spells 'n Spellbooks [1.21.1-3.12.0]
2. Curios API [9.5.1+1.21.1]
3. Geckolib [4.7.5.1]
4. playerAnimator [2.0.1]

[2No2Name]

Seems like shields are multipart entities with possibly hard hitboxes, lithium might not expect that. If this is correct, this requires change in lithium