Villager Double Trades

Hello, I run custom servers for my friends to enjoy and play. Recently I found a bug in my villagers. It appears that if they have a double trade (1 stack of stone brick in the buyA and buyB slots) players are allowed to trade only a single stack for the rewarded item. For now I’ve gone and removed all of the double trades but I was still wondering if this will be fixed at any time? Thanks.