With the new trial chambers, breaking some of the decorated pots that spawn with items won't cause them to revert to a decorated pot like when you craft one. It retains the NBT data (or whatever Bedrock's equivilant is), and breaking it again will drop itself and a random item from the Trial Chamber Decorated Pot loot pool. Through some quick testing, I was able to rapidly get over a stack of emeralds.

The only way to get it to lose the NBT data that stores the loot pool when broken is to try and place an item inside of the pot. Breaking it after doing that will still drop a random item, but the pot item no longer stores the data/loot pool

Here's a youtube video demonstrating the issue: https://youtu.be/wsfegNjem_s?si=ckWfcpKlxncUb322