When I /place a village, the paths... the villagers have no idea on how to place paths. The paths can be up in trees, and with random path blocks sticking up. And when on the water, some blocks may be missing, but when you go into a forest, on the ground some paths are missing, why? they are on the tree canopy... and trees &/ leaves can spawn in the houses, and blocks can block the doors. Path blocks even get placed on top of tall grass!

To fix, replace some structure_voids with air in the structures, make it so paths won't always chose the uppermost blocks, etc.

But natural villages seem to be fine, I'm only noticing this when I use /place