Accessory that lags the entire game

Hey everyone! I’ve found out about two accessories today which can make your whole game lag.

The asset IDs are:

Creator of the items is Epixerty.
Here is the video of my game dropping to 20 fps from 240 from the accessories.

It is unknown how they are lagging the game, as they are meeting the 4k triangles and 4k vertices limit… if anyone knows why this happens, let me know.

Even Blender lags when this model is loaded.

(Also, I know this is the incorrect forum but I’ve asked for access for Bug Report forum, so kindly let me post there, Roblox Staff.)