Slime block not bouncy with piston on Bedrock

[pdyq]

Describe the bug

A piston with a slime block on top should bounce the player upwards. However, when it is on Bedrock (on mobile specifically, unsure about other platforms), it pushes the player away. It works on both Java and Bedrock in a singleplayer world. However, it does not work when a Bedrock player is connected to the server with GeyserMC.

To Reproduce

1. Be on Bedrock
2. Put a piston facing upwards
3. Put a slime block on top of the piston
4. Stand on the slime block
5. Power the piston

Expected behaviour

The player should bounce on top of the slime block after the piston is powered.

Screenshots / Videos

On Java: (with shaders) https://github.com/GeyserMC/Geyser/assets/112796080/5c6b022b-61cf-4410-a53c-6b30e6d7f461

On bedrock: (in Chinese) https://github.com/GeyserMC/Geyser/assets/112796080/206110ad-233f-4eda-8628-7c941f36c9ab

Server Version and Plugins

This server is running Geyser version 2.4.0-SNAPSHOT (git-master-63a3da7) (Java: 1.21, Bedrock: 1.20.80/1.20.81 - 1.21.0) Fabric server 0.15.11, Minecraft 1.21 Plugins: VMP Styled Nicknames Lithium Krypton (fork) FerriteCore Factions Carpet Fabric API C2ME Geyser Floodgate Chunky

Geyser Dump

https://dump.geysermc.org/sacW8a65s3QnAZeWEf7HxNxOZwlKuNP5

Geyser Version

2.4.0-SNAPSHOT

Minecraft: Bedrock Edition Device/Version

1.21.1

Additional Context

No response