Block breaking progress can be retained by using the world border

The Bug:

Block breaking progress can be retained by using the world border.

Steps to Reproduce:

1. Locate the world border and find a block that's on the edge of it.

2. Begin breaking the block and without letting go of your Attack/Destroy button, move your focus to the world border.

3. Take note as to whether or not block breaking progress can be retained by using the world border.

Observed Behavior:

Block breaking progress can be retained.

Expected Behavior:

Block breaking progress would not be retained.