Speedkarts using raycasting instead of collision sometimes?

[King of the Bill]

So I've been working on a speedkart track, and I was having some trouble with some decorative bricks cluttering the track, so I decollisioned them. Simple problem, simple solution, right?
Well, the bricks in question are 2x10 plates and a 2x2 plate. I don't know if that's relevant somehow.
Anyway, so I decollisioned them. Then, as I was driving past them, I noticed something funny.
My kart was still colliding with them.
I went "wait wtf" and re-wrenched them.
Still no collision.
I walked through them.
I walked through them normally, like one is supposed to do when collision is off.
Meanwhile my kart was parked on the bricks in question.
I turned off raycasting on one of the bricks, and my kart wheel fell down through it.
When I turned raycasting back on, the wheel popped back up on top of it.
So what in the world is going on here? Do physics use raycasting sometimes now, or what?

[Ad Bot]

[xSetrox]

iirc this happens with all vehicles

[King of the Bill]

iirc this happens with all vehicles

Huh.
So is this just part of the broken vehicle physics package or what?
Also further investigation shows that when the wheels hit the side of the brick, collision applies normally; it's the top where it uses raycasting instead for whatever reason. Meanwhile the rest of the vehicle still uses collision.