Problem exporting model

Good afternoon guys!

It’s been months since my team and I tried to figure out a way to fix the export of our company’s 3D models, but we always fall back on the same problem. We already exported from Blender and 3DMax with different parameters.
The model loads right into the Playcanvas, but when adding the collision (mesh type), the result is very strange. The Raycast crosses certain parts and intersects with empty areas which makes it appear that the collision has nothing to do with the model.

On the link below you can see a project demonstrating this:
PlayCanvas | HTML5 Game Engine

Anyone have an idea of how can i solve this exportation issue or to solve this at playcanvas?