.:BUG REPORTING:. Custom weapons seen through vehicles

[FelixFrdOf]

So I was making map, and then I was playtesting and found that you can see custom weapon through vehicles. I was thinking that it was nothing, and so I moved on. But it wasn't hidden, so I tried these things:
1. Setting decor not to be drawn in front
2. Setting weapon only to be for characters
3. Deleting vehicle and placing new one, so it will be drawn in front
4. Placing vehicle gun on vehicle

None of it worked, and I have no idea what would help.

Here is id: felixfrdof-therecover1
Here is photo: https://ibb.co/1MwTdR8