Crops can generate on magma and netherrack from ruined portals when they intersect villages

The Bug

When a Abandoned Portal intersecting with a village, there is a chance that the netherracks generated by portal structure could replace farmland, but not destroy the existing crop on that replaced farmland block.

Steps to reproduce:

Generate a new world with seed -2324492432514134047, teleport to X=1387 Y=128 Z=-473.

The affected crop is located at X=1388 Y=127 Z=-472.

Observed results:

The farmland block is replaced with netherrack, with a crop generated on it.

Expected results:

The farmland block shouldn't be replaced, or that crop shouldn't exist.