Players and Mobs fall off vehicles and other ridden entities upon world reload, glitching through blocks

When leaving and re-entering the game the player and other mobs

• glitches trough the minecart and the block below, if just one block below the tracks
• or sinks into the block when there are more blocks below the tracks. The minecart is invisible then.

Minecart is standing still.

Update: This applies to all ridden entities Minecarts, Boats and Pigs.