When physicscharacter jumps it hacks at the point where you start going down

I do the simple jump method on a physiccharater.

Then when it stops going up, it teleports a bit down as it starts to fall down.

So if I jump up to 3. It will move for no reason to 2 and start falling from there.

I have no method that sets any position in y for the character. Im using it as it was in the example.

I have changed some values tho:

fallspeed 30

jumpspeed 20

gravity 60

and radius on the cylinder shape to .5.

Is it a bug or?