Players in spectator mode continue to use brushes shortly after switching game modes

The Bug:

Players in spectator mode continue to use brushes shortly after switching game modes.

Steps to Reproduce:

1. Obtain a brush.
2. Begin using your brush on a block and as you're doing this, quickly switch into spectator mode by pressing "F3 + N".
3. Take note as to whether or not players in spectator mode continue to use brushes shortly after switching game modes.

Observed Behavior:

Players in spectator mode continue to use brushes shortly after switching game modes.

Expected Behavior:

Players in spectator mode would not continue to use brushes shortly after switching game modes.