Whenever I put bone meal on the ground there is always grass that is two blocks tall. Or at least there is supposed to be. The top half immediately breaks most of the time, with particles and everything. All that is left after that is minecraft:tall_grass, half:lower, which shouldn't be obtainable.
Are you on a server? Could you attach a short video showcasing the issue? (If the file size is too large, you can upload it somewhere else and link to it here)