Tridents no longer stay centered in a block while using a EXP farm

Hi there! The newest release that came out on the 30th of October 2019 just caused a bug. I have an exp farm I use in my survival world. It's a zombie spawner with a water direction method to have them drop into a hole where a kill chamber would have a sticky piston moving a slab back and forth with a trident that was thrown into the slab. Normally I could throw a trident into the center of the slab and then turn the sticky piston on, and it would kill the zombies as I am afk. The Trident used to move around a bit but the tip would always stay centered in the slab where it was thrown, keeping the kill zone the same all the time. Now it walks and causes it to fall off the side of the slab, making it useless. I rearranged the design a bit to help, but it still happens. Also if I am one block away from the trident, I can pick it up through the wall. That never used to happen. I hope this gets fixed because it's really my only semi fast source of exp.

Thanks

Anthony.