Block duplication when placed near entity

It is possible to place blocks near entities, however when the block is placed it does not get removed from the inventory.

Reproduce (see screenshots)
1: Lock a villager between blocks
2: Place a block closest to the villager
3: Break the placed block and voila

Tested this on PC as well as on my mobile device. Not sure if I used security level properly but I would define this as an exploit.