KinematicBody2D spanning 3 collision blocks causes Y jitter

[chucklepie]

Godot version:
3.2.2 stable (on linux, gles3)

Issue description:
I have a tilemap and a kinematicbody2d. The code, as below, simply applies a downward y velocity and calls move and slide. When walking y velocity is 0. However, when the kinematic body spans 3 collision tiles then every other frame changes y velocity toggles between 0 and 5.166667 continuously. As soon as the kinematic body only spans 2 tiles y becomes 0.

Image below shows the body spanning 3 tiles and as stated y jitters in this position.

The code is as follows, inside _physics_process:

func move_player(delta):
	velocity.y+=Globals.GRAVITY*delta
	velocity.x=lerp(velocity.x,MAX_SPEED*direction,_get_h_weight())
	velocity=move_and_slide(velocity,Globals.UP)

I did notice a similar fault raised, but this is for a 3D object
#35780

[Calinou]

@chucklepie Please upload a minimal reproduction project to make this easier to troubleshoot.

[pouleyKetchoupp]

Fixed in #42574, closing.