Timer on the lower playfield is buggy. Sometimes it starts counting down well before the ball is served, other times it counts down while still in the mystery scoop.
As much as I like that lower playfield, it has more issues than I care for:
1. Too easy to reach
2. Scoring too low
3. Timer buggy (see above)
4. Ball jumps over the ramp's opto switch thus no extra time added, fix is to put a lid above the opto switch.