Describe the bug

Wandering traders are essentially impossible to pickpocket in survival. They:

• Can see through basically solid blocks such as stairs, slabs, and closed trapdoors, and can see through the the corners of full blocks.
• Ignore invisibility effects.
• Can "see" a player trying to open their backpack even when fully turned away and having made no recognition noise, meaning it's also impossible to know when you're supposedly 'hidden'.

To Reproduce

Try to pickpocket a wandering trader

Expected behavior

Line of sight shouldn't ignore solid opaque blocks and invisibility should have some kind of effect

Mod Version

Every version that has wandering trader bags

Minecraft Version

"

Modloader

Forge

Crash Log (if applicable)

No response

Additional context

The only way I have been able to get the pickpocket screen to show up is in creative, spawning them in a hole with spawn eggs and getting lucky by spam rightclicking and hoping they spawn facing away so I can click the bag before they check their surroundings.