Skeletons briefly lower their arms after shooting when holding a spear in their off hand

When a Skeleton has a spear equipped in its off-hand, it exhibits an animation bug after shooting an arrow. Immediately upon firing, its arms briefly drop (as if transitioning to an idle state) before snapping back into the aiming posture.

This bug is specific to the spear being in the off-hand.If the skeleton‘s equipment is swapped – holding a bow in the off-hand and a spear in the main hand – the animation proceeds normally without any interruption. 

Steps to Reproduce:

1. Summon a Skeleton with a spear in its off-hand using this command:

   /summon minecraft:skeleton ~ ~ ~ {equipment:{mainhand:{id:"bow",count:1},offhand:{id:"diamond_spear",count:1}}}

   /summon minecraft:skeleton ~ ~ ~ {equipment:{mainhand:{id:"bow",count:1},offhand:{id:"diamond_spear",count:1}}}

2. Aggro the skeleton and observe its arm animation immediately after it fires an arrow.

3. Summon a Skeleton with swapped equipment to confirm normal behavior:

   /summon minecraft:skeleton ~ ~ ~ {equipment:{mainhand:{id:"diamond_spear",count:1},offhand:{id:"bow",count:1}}}

   /summon minecraft:skeleton ~ ~ ~ {equipment:{mainhand:{id:"diamond_spear",count:1},offhand:{id:"bow",count:1}}}

Expected Result:

The skeleton‘s arms should maintain a smooth,continuous aiming animation between shots, regardless of equipment.

Observed Result:

1. With a spear in the off-hand: After every shot, the skeleton‘s arms briefly lower downward before immediately resuming the aim. This happens consistently.

2. With a bow in the off-hand & spear in the main hand (Control Test): The shooting animation is normal and continuous without any interruption.