The Bug:
Block breaking progress can be retained by using the world border.
Steps to Reproduce:
Locate the world border and find a block that's on the edge of it.
Begin breaking the block and without letting go of your Attack/Destroy button, move your focus to the world border.
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.
Linked issues
relates to 3
Attachments
Comments 18

Confirmed for 14w19a.

Confirmed for 14w21b
Confirmed for 1.8pre2

Confirmed for 1.9
Can confirm in 21w06a.
Can confirm in 21w07a.
Video attached.
Can confirm in 21w17a.
Can confirm in 1.17.
Confirmed.
Breaking animation vanishes if looking at Worldborder + 2 blocks.