After curing villager they trade one rotten flesh for a emerald

When curing a zombie villager they will trade one rotten flesh for one emerald or a clay ball for

an emerald, for ever

 

*Expected result * 

After curing a zombie villager there is a litle discount for 10 minutes

 

*Actual result *

After curing a zombie villager there is a 99% discount for ever

 

*How to reprouce *

1. Cure a zombie villager
2. check the trades

I dont like the bug you are basically cheating in Emeraldes