Summary
Entities such as passive mobs, hostile mobs, and even the players themselves don't have shadows anymore on their feet.

Step to Reproduce
Spawn some mobs around, or try to go to third-person to see yourself.

Expected Result
The shadows appear on your feet or mobs feet and are rendered properly.

Observed Result
No shadows on mobs at all, or even the players themselves have.

Note
Keep in mind this doesn't cover players when flying with elytra, and lightning bolt since it is supposed to have no shadows at all. (MCPE-137172 & MCPE-140689)