[MC-128] 3rd person view reverts to 1st person view if head inside a block (corner a one block wide tunnel in a minecart, ride on a horse through a block, piston...)

The 3rd person view reverts to 1st person view when player's head is moved inside a block (e.g. while riding a minecart around corners) or a block is moved by piston or setblock at the place of player's head

To Reproduce

Go into F5 (3rd person) mode
Clip your head inside a solid block (doesn't matter how long you clip) using one of various methods:
- Ride a horse under a 2-block tall gap
- Ride a minecart around a corner in a 1-block wide trench/tunnel
- Do /setblock where your head is
- Suffocation traps
- Anything else you can think of
You would expect that when you are no longer inside the block, you would return to 3rd person mode
Instead, you are left in 1st person mode