When running around, especially with a map in your hand (or off-hand), you will notice how the arms of the player aren't moving.

Video:
https://drive.google.com/file/d/1LcHCrGWp_BI5kVZ531jyPksJY843DGb6/view?usp=drivesdk

How to reproduce:
1. Find a map and put it in your hand (or off-hand).
2. Run around

How I expected it to work:
For both hands to bob in sync with the screen

How it happened instead:
Didn't move at all unless I looked around.

Update: Partially fixed in the 1.13.0.18 beta. The problem remains that the map in the main hand or off hand are still out of sync.