This is still ongoing for me -
https://crash.limetech.org/gj5e5esjbuyx
I've resorted to replacing the items added in the update (Thermal Thruster, Gas Passer, Dragon's Fury, Hot Hand and the heavy's Banana sandvich) with stock weapons when they're given to clients.
As well, when one of the new taunts spawns its scene entity and/or taunt prop entity I destroy them.
I'm hoping this will prevent the crash but am skeptical.