Simple flowchart not rendered correctly

Hi,

I've got a fairly simple flowchart:
st=>start: Start
e=>end: End
cond1=>condition: Need to create
a flowchart?
cond2=>condition: Do you understand
Visio?
cond3=>condition: Do you understand
text?
op1_1=>operation: Spend hours fiddling
with lines and grids
in Visio
op1_2=>operation: Rush the actual design
of your flowchart
because you spent
hours dealing with Visio
op1_3=>operation: Review and update
your flowchart, constantly
having to move and
re-align parts of the
diagram
op2_1=>operation: Write a few lines
of text describing
your flowchart
op2_2=>operation: Use flowchart.js to render
your flowchart in seconds
op2_3=>operation: Review and update
your flowchart quickly
op2_4=>operation: Release completed design
op3_1=>operation: Scribble on paper
op3_2=>operation: 10 sheets of paper later:
finish your design
op3_3=>operation: Scan coffee stained paper
design where no one can
read your handwriting
st->cond1
cond1(yes)->cond2
cond1(no)->e
cond2(yes)->op1_1->op1_2->op1_3->e
cond2(no)->cond3
cond3(yes)->op2_1->op2_2->op2_3->op2_4->e
cond3(no)->op3_1->op3_2->op3_3->e

This renders (locally and on http://flowchart.js.org/) incorrectly (one of the lines passes through a box).

Is there any way to fix this behaviour?

Interestingly, it seems that if I make the left-most flow longer, it fixes the issue so there seems to be an issue when any non-left-most flow is longer than the left-most flow.

Thanks.
Richard.