Broken/slow animation.

All three behaviors below occurred at once.

1. All mobs are moving in small increments every second instead of in a steady and smooth motion.
2. Eating animation is divided into two parts; eating and then food particles falling. Causing the total animation duration twice as long as it was before.
3. Some blocks are destroyed but leaves an afterimage. After the 'popping' animation of a block breaking, some of the blocks appear to remain in place. But disappears after a few seconds.

The issues remain after lowering all settings and removing all resource packs (shades). The FPS remains on average 75. These issues do not apply once creating a new world. However, displays the same problem in this one particular world.