Where did box 5 go?

Hello,
I have written a simple box diagram using your Flowchart code, but for some reason box5 is not rendering. Please can you advise?

Regards,
Nigel

`box1=>parallel: System box 1
Is there a comment method?
box2=>parallel: System box 2
Organising boxes looks like a great
way to document systems and
incorporate hyperlinks.
box3=>parallel: System box 3
The lines have been whited out
so that they are hidden.
box4=>parallel: System box 4
Oops, Where did box 5 go?
box5=>parallel: System box 5

box1(path1,bottom)->box2
box1(path2,right)->box3
box3(path3, right)->box4
box4(path4, bottom)->box5

box1@>box2({"stroke":"White"})
box1@>box3({"stroke":"White"})
box3@>box4({"stroke":"White"})`