If you break the upper part of a 2-block tall plant (peony, sunflowe, huge grass...), it gives grey particles (it shouldn't). When you break the lower part, it changes into a sunflower for a brief period of time while giving correct particles.
Linked issues
Comments 4
MC-29590 is only about the particles, not about the plants changing into sunflowers.
Duplicate of MC-29590 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.