Is the steertube carbon or alloy? Are you using any spacers between the stem and the headset?

My advise is if the steertube is carbon you should not use it the way it is setup. Take a spacer from below the stem is there are any and move it above the stem so more of the stem clamps down on the steertube.
If you have an alloy steertube I advise the same thing but it is not as crucial because the alloy steertube is more robust. Being that the upper stem clamp screw is below the top of the steertube you should be ok, but it is not ideal.
You could also get a stem with a shorter stack height. It would be cheaper than buying a new fork.