Landing on Upward Moving Slime Block Doesn't Reset Fall Damage

When falling on a slime block moving upward, the player will not take fall damage. However, the player will take this damage next time he/she lands on a block, regardless of how far the player falls after being bounced. See video:
https://www.youtube.com/watch?v=-L-spPdBUaU&feature=youtu.be