The bug

Whenever a piglin has a loaded crossbow while there's no hoglins wither skeletons or withers nearby, they'll always hold it with one hand, and not two. In Bedrock Edition, they hold their loaded crossbows with two hand when there are no entities that the piglin attacks.

To reproduce

1. (In Java edition) Either spawn a piglin and force it to successfully load its crossbow or use this command below:

    /summon piglin ~ ~ ~  {NoAI:1b,HandItems:[{id:crossbow,Count:1b, tag:{ChargedProjectiles:[{id:"arrow",Count:1b}],Charged:1b,Damage:0}}]} 

   → The summoned piglin holds its loaded crossbow with one arm

2. (In Bedrock edition) Spawn a crossbow piglin and force it to successfully load its crossbow switch to creative mode
   → The piglin holds its loaded crossbow with two arms.