Piglins with crossbows that turn into Zombie Pigmen don't keep crossbow

The Bug
When a Piglin with a crossbow transforms into a Zombie Pigman it doesn't keep the crossbow. The crossbow turns into a Golden Sword.

Replicate

• Spawn a Piglin with a Crossbow in Overworld (I did this by spamming the spawn egg till I got one)
• Watch the Piglin transform into Zombie Pigman
• Notice Crossbow turns into Golden Sword