When you break the top of tall grass it makes sunflower particles and doesn't drop anything but when you break the bottom it flashes as a peony,breaks, then drops untextured normal seeds with the same id of wheat seeds and it will also drop double tall grass blocks.and the fill command doesn't work with any of the double plants and setblock only places one block of the plant.
Environment
64 bit java Gateway PC
Please put only one bug report in each ticket. It is very difficult to keep track of bugs when they are not in their own tickets, and it is easier for you to make multiple tickets than for the mods to separate them.
And please use the search function in the future as all of the issues are reported multiple times.