Describe the bug
When using the reIntroduceItemShadowing and reIntroduceInstantBlockUpdates commands in a singleplayer world, the expected behavior is shown, where items can be successfully shadowed.

However, when attempting this in a modded server, with the exact same modlist and options selected, update suppression is possible, but item shadowing is not.

I have both options enabled in both my own client, as well as in carpet-fixes.conf which is located in the root directory of the server files.

carpet-fixes.conf

reIntroduceInstantBlockUpdates true
reIntroduceItemShadowing true

Minecraft Version:

• 1.20.1
  Carpet-Fixes Version:
• v1.16.1
  Carpet Version:
• v1.4.112+v230608