When spectatorsGenerateChunks is set to false, the player cannot stop spectating an entity without running /spectate

When the game rule spectatorsGenerateChunks is set to false, the spectator mod player cannot break away from the observed creature.

Steps to reproduce:

1. Run the command: /gamerule spectatorsGenerateChunks false
2. Make sure you are not in a force-loaded/spawn chunk
3. Place a mob and spectate it
4. Press the Sneak key (Left Shift by default)

Observed result:
You do not stop spectating the mob. You can only stop spectating the mob after running /spectate

Expected result:
You stop spectating the mob.