I have a nether wart farm that uses water to break grown nether wart. It worked fine before, but now, the water doesn't break the wart, flowing from the side, or from the top (I tried both). I think it is a bug, unless I missed something?
also, there are a couple bugs at the moment with water flowing, so its possible that your water isnt flowing. I had issues with water coming from dispensers earlier
Oh my god! you're a... jewel! that was it : I tested with buildmode off, and it worked fine. Thank you for the tip. I still found a bit strange a crop would be buildmode protected. Do you know if it's the case with other crops?
I really don't use build mode but according to the wiki "Liquids are not protected, even if they are placed while in Build Mode. Crops such as sugar cane, lilypads, water, lava and potatoes were previously not protected even if they were placed in Build Mode, but that no longer occurs."