Villager trading bug - infinite player/villager xp

Found a bug in villager trading, where trading for items from a villager resulted in the trade glitching out. The items are not received and the emeralds are returned. Furthermore, the incomplete trade still provides xp to both the player and villager. Bug coould be exploited as a virtually free, infinite way of obtaining xp.

 

I have recorded a video of the bug, if needed, and can email it through, however I cant upload it to this report as my xbox is not allowing it.