Armor pieces with efficiency enchantment

I was on a copy of one of my survival worlds two days ago in 1.19.83 to scout out where I could find armor trims when the update released. During this I was in a woodland mansion and I find a secret room with a chest. Inside the chest is an efficiency 1 leather chestplate. Today I go to the same mansion on a different copy (so the mansion has never been loaded in yet) and I go to the same room and I find leather pants enchanted with efficiency 1.