Radar plot labels

Question

I have fairly basic Python knowledge but I am trying to use it to plot a radar graph. I have done this before but now my script is causing an issue. I don't need any data to demonstrate so I won't add it, my script draws a radar plot, and plots the data but when I add variable labels for some reason it zooms in on one quadrant of the radar plot.

    fig = plt.figure()
    plt.clf()
    ax = fig.add_subplot(1, 1, 1, projection='radar')
    ax.set_varlabels(labels)

Any ideas why and how to fix this, it used to work so I think there must have been an update and maybe I need a different command? I am using Python 3.6.4 via Anaconda.