Ted -
Pretty std stuff, and happens to all of us.
As soon as a target is in front of you, you start using different parts of your brain and that gets in the way of making the shot.
That's one reason I tell my new clicker users to start and end every practice session with a few ends of blank bale/watch the clicker exercises. Whenever the clicker break becomes an issue, going the back to the bale and seeing the clicker break can correct the short circuit.
Another trick that can work is when you have the "clicker panic" (which is what it is) while still focusing on the target, play back the tape of seeing the clicker break at the bale.
Unfortunately, that implies you were taught to use the clicker correctly, there is no form change and the target elevations are the same. If you can easily break the clicker @5 yards and not a 70M, that's a different scenario.
Viper1 out.