Players in spectator mode are pushed back by the pistons and blocks that move the pistons

Steps to Reproduce:

1. Make a mechanism with working pistons
2. Switch to spectator mode
3. Fly up to the activated mechanism
4. The player is pushed away by a piston

Observed Results:
The player is pushed away by a piston

Expected Results:
The player remains in place

Notes: slime blocks push you back even more. It gets in the way when you're flying inside the mechanism