Unable to break 1 row of melons on the c farming area

[fallingmonkey]

What is the bug: Cannot harvest / break a line of melons.
Where is this bug located: C block farm
How can we recreate it: Go to c block farm, try to break the melons.

Image for reference: http://imgur.com/a/bEHUK

[mitsuo_wolfblood]

Use the pressure plates....

[WyldcatG]

[fallingmonkey]

Wow I didn't even notice those pressure plates, well it is still strange that it is the only row you cannot mine by hand but fair enough.