Having the same issue with 100% default settings fo a superflat world. Not any gravel appears in any village, but all other parts of the village generation seems to be unaffected.
Minecraft 1.13-pre1 running with java 1.8.0_25 (I beleve, I have multiple javas installed due to different programs not working on some versions, but I think this is the one it uses)
I tested this myself, and cannot find any way the behaviour is different in pre1 than in 1.12.2. You just break one block per gametick. Is there a specific scenario where you actually break them instantly that you have found? If so, I haven't been able to recreate it.
Jelle R
Having the same issue with 100% default settings fo a superflat world. Not any gravel appears in any village, but all other parts of the village generation seems to be unaffected.
Minecraft 1.13-pre1 running with java 1.8.0_25 (I beleve, I have multiple javas installed due to different programs not working on some versions, but I think this is the one it uses)