Moving minecarts, upon saving and exiting a world, will cease to make sound.

Steps to reproduce

1: Build a simple machine to keep a minecart in perpetual motion, perhaps with powered powered rails and blocks, like this: █════█

with the █ being solid blocks and the ═ being powered rails that are on.

2: place a minecart on the machine and give it a push.

3: save and exit your world

4: launch the world again

If I am correct in this, then the minecart will not produce sound.

Upon further investigation, this applies to ALL minecarts in the world, even if they are created after relogging. It appears that triggering a debug crash and relaunching the game with quick play fixes the issue.