Omena0
also happens on 1.21.1
Should be fixed by my PR, the core issue with the partial packet is not fixed though, only the physics crash.
@Sheepy3 can you test again with my fix? Does it still occur? If not, please close this issue. Thank you!
Are you sure its using the fixed physics.js? If not, try to add some console.logs to see more precisely what causes it.
F:\Sauce\townyAI-Mineflayer\FinalbotsV3\node_modules\mineflayer\lib\plugins\physics.js at line 299
Just as I remembered, you don't have the fixed version. Your error happens to be on line 299 with a Vec3.add... 
And someone else has added a guard clause for older versions. 
Yeah, I don't really know how the packet reading works, might have to investigate it further. But this fix would've been a problem anyways since it was using nonexistent fields....
You should probably close this issue and make a new one for the packet reading one.