What I expected to happen was...:
Smooth camera movement when walking from repeaters or cakes to slabs, from cakes to end portal frames, or end portal frames to chests.
What actually happened was...:
The camera jerks downward. This does not happen when moving from or to full blocks, or from half meter tall blocks to any other block.
Steps to Reproduce:
1. Place a cake, repeater, or trapdoor next to a slab
2. Walk from the cake, repeater, or trapdoor onto the slab
3. Notice that the camera jerks downward when transitioning to the slab
4. Repeat, moving from cakes to end portal frames and from end portal frames to chests