It turns out if you have invisibility and you get into any XV, it makes the vehicle invisible.

Now, this was the Unreal1 invisibility which makes players completely invisible unlike the ut99 version which leaves a slight shimmery effect.
As I've periodically commented, dinosaurs of the Jurassic.u don't attack XV's vehicles. Even if you shoot them or ram them, they don't attack.

However, due to an MH XV edit I'm doing, I've discovered that's not entirely true. Vehicles like the GK1 tank & Jeeps can take on a 2nd passenger; rear gunner for the jeeps & the machine gun on the tank... and the dinosaurs can see that extra passenger!
Still bugs they can't see the main driver, makes any maps using the Jurassic.u a little unfair. Would love an explanation why that is, and possibly a workaround to make mapping with that more fair.