| Jools unless it was wet, I venture to suggest its practically impossible to loose the front end just by turning the bike quickly on a steady throttle position-on a track.
I would suggest that maybe you held the front brake for too long into the turn or you maybe rolled off the throttle a bit violently, both would transfer the weight onto the front, loading up the tyre and reducing grip.
As for the gremlin-I'm sure its a confidence thing, practice is the only way to overcome it. I now have the same thing about getting on the power too hard on the exit after my recent off. | 
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