The bug
The game plays the walking animation and shakes the viewport when the player is swimming while touching the ground and has "View Bobbing" enabled in their video settings.
Environment
Microsoft Windows [Version 10.0.15063]
Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz, 3.40 GHz
64-bit operating system, x64-based processor; 8.00 GB RAM
NVIDIA GeForce GT 630; GeForce Game Ready Driver Version 385.28
Java 1.8.0_144-b01 (64-bit)
Linked issues
is duplicated by 4
Comments 3
Cant reproduce the walking animation on a Mac. View bobbing is already taken care of in MC-126325
A video by @unknown showcasing this bug (with enchanted boots as well, which makes the issue more visible) can be found here: https://www.youtube.com/watch?v=dfTnDj7dP6Q
Appears to happen when you are on ground while swimming