In 1.10.0.4 Beta, zombie villages (a rare type of village with zombie villagers and mossy cobblestone) do not generate when experimental gameplay is on.

To reproduce:

Seed: 191259088, Coordinates: -535, 65, 335

In 1.10.0.4 without experimental gameplay (and in prior versions as well), there is a zombie village.

In 1.10.0.4 with experimental gameplay (new villages), the zombie village does not generation.

Not sure if this is a bug or a temporary limitation.