Object drifts when Simulate physics turned on

If I want the object to remain still what do I do? I tried constraint to axis / plane on my hover vehicle with Floating pawn component but nothing worked.
I basically have a set simulate physics and Enable Gravity nodes set up when and only when I approach a vehicle to drive it. This works; it’s just the vehicle will now drift in every which direction whenever I am moving the vehicle or not.

It is not ticked in this photo because this is for when I exit the vehicle