can confirm this
Ive seen clients crash with miniscule amounts of pistons I cant fathom how lower end hardware would fare with any amount of pistons, this lag is gamebreaking I know of many people who wont update because of this lag alone.
Please consider reverting this as it has a large impact on many designs already in the game since very early versions.
can confirm this bug wither will explode a blue skull at his feet if there is a block36 or moving piston entity to be more specific kind of confusing why this happens.
minor edit: if you zero tick a block into his feet he will not shoot at his feet height.