I've tested the following build in both a vanilla Minecraft server and a Fabric server and noticed that the redstone behavior is inconsistent. Specifically, in the Fabric server, the contraption does not throw items, whereas in the vanilla server, it works as expected.

Steps to Reproduce:

1. Follow the redstone build tutorial: YouTube Video.
2. Set up the contraption in both a vanilla server and a Fabric server.
3. Compare behavior:
   • Vanilla Server: Works as expected (throws items).
   • Fabric Server: Does not throw items.

Expected Behavior:
The redstone contraption should function the same way in Fabric as it does in a vanilla server.

Observed Behavior:
The redstone does not throw items in the Fabric server.

Environment:

• Fabric Server Version: fabric-server-mc.1.21.4-loader.0.16.10-launcher.1.0.1
• Mods Installed: (no mods)
• Java Version: 21
• Operating System: (Windows and Linux)

Additional Context:

Please let me know if any logs or further testing would help debug the issue.

only works in single player. Not a fabric specific issue, its actually a minecraft multiplayer bug