I found this in the latest snapshot (31/1/24)

Summary:

When you are in low tick rate, the game lets you (with commands) put high level potions (+128), when you switch back to normal tick rate, the game crashes.

Steps to Reproduce:

1. Put your tick rate at 5

2. Give with commands a 128 level potion

3. Put your tick rate at 20

Then the game should crash

Comment if you have questions