When a piston pushes a slime lock upward and there is a player on top, the player does not get launched

Expected Result: when the player is pushed by the slime block, they should get boosted upward like other entities

Actual Result: the player only gets pushed up 1 block as if the slime is a normal block (like stone or wood)

Reproduce: have a piston facing upward with a slime block on top, then stand on the slime block and activate the piston