Surface plots not showing x, y ,z (axis) titles

[kannansingaravelu]

I have a 2D grid filled with option prices. The index is the range of spot prices while the columns are time to maturity. The surface plot always print the axis titles as x, y, z and not taking the user inputs.

input:
grid.iplot(kind = 'surface', title='Option Payoff', xTitle='Spot', yTitle='Maturity', zTitle='Option Price')

output:

This seems like a bug. Could you take a look and resolve this issue?