Lost Lag. Failed to reach aiming point. Club head was pre-maturely DOWN and the Low Point of the circle moved behind the ball.
So it could be said that overacceleration and deceleration (especially short game) are both demons!
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"In my experience, if you stay with the essentials you WILL build a repeatable swing undoubtedly. If you can master the Imperatives you have a champion" (Vikram).
The reason you can't sustain the lag is because you are so eager to make the club move fast (a reaction to the intent of "hitting it far"). So on a full shot you throw it away too early, which doesn't happen for your short chip. (bts)